SimCom SIM8905A Manuale utente

SIM8905A_User Manual_

V1.00

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Compliance Information:

FCC Compliance Statement: This device complies with Part 15 of the FCC Rules . Operation is

subject to the following two conditions: 1. This device may not cause harmful interference, and 2.

This device must accept any interference received, including interference that may cause undesired

operation. This device must accept any interference received, including interference that may cause

undesired operation. Product that is a radio transmitter is labeled with FCC ID.

FCC Caution:

(1)Exposure to Radio Frequency Radiation. This equipment must be installed and operated in

accordance with provided instructions and the antenna(s) used for this transmitter must be installed

to provide a separation distance of at least 20 cm from all persons and must not be collocated or

operating in conjunction with any other antenna or transmitter. End-users and installers must be

provided with antenna installation instructions and transmitter operating conditions for satisfying RF

exposure compliance.

(2)Any changes or modifications not expressly approved by the grantee of this device could void the

user's authority to operate the equipment.

(3)This Transmitter must not be co-located or operating in conjunction with any other antenna or

transmitter.

(4)Changes or modifications to this unit not expressly approved by the party responsible for

compliance could void the user authority to operate the equipment.

(5) the modules FCC ID is not visible when installed in the host, if the host is marketed so that

end users do not have straight forward commonly used methods for access to remove the module so

that the FCC ID of the module is visible; then an additional permanent label referring to the enclosed

module: Contains Transmitter Module FCC ID: 2AJYU-8PSA301 or Contains FCC ID: 2AJYU-8PSA301.

The following statement must be included with all versions of this document supplied to an

OEM or integrator, but should not be distributed to the end user.

This device is intended for OEM integrators only.

Please See the full Grant of Equipment document for other restrictions.

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1. SIM8905A Description

1.1. Summarize

SIM8905A is a smart module, which is based on Qualcomm MSM8909 platform. It includes baseband, memory,

RF front end and required circuitry to support LTE-FDD.

1.2. Feature

Feature Implementation

Application Processor

QuadARM Cortex-A7 cores up to 1.1 GHz

32 kB L1, 512 kB L2 cache

ARMv7 32-bit architecture

Memory

8Gb LPDDR3 up to 533Mhz; (SIM8905AH：16Gb LPDDR3 RAM)

8GB eMMC NAND flash

External memory via SD

SD3.0; Support SD flash devices up to 32GB

Operating System

Android OS 5.1/7.1/8

Power supply

3.4V ~4.4V

Charge management

Integrated 1.44 A linear charger for single-cell lithium-ion batteries

Display

4-lane MIPI_DSI, 1.5Gbps each

HD(720P), 60fps

Camera

Primary camera: 2-lane MIPI_CSI, 8MP

Secondary camera: 1-lane MIPI_CSI, 5MP

Video performance

Encode:

H.264 BP/MP –720p, 30fps

MPEG-4 SP / H.263 P0 –WVGA, 30fps

VP8 –WVGA, 30fps

Decode:

H.264 BP/MP/HP–1080p, 30 fps

MPEG-4 SP/ASP–1080p, 30 fps

DivX 4x/5x/6x–1080p, 30 fps

H.263 P0–WVGA, 30 fps

VP8 –1080p, 30 fps

(HEVC) H.265 MP 8 bit –1080p, 30 fps

Audio

Two inputs that support single-ended configurations

Three outputs: earpiece, stereo headphones, and mono class-D speaker driver

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Voice codec support:

G711; Raw PCM; QCELP; EVRC, -B, -WB; AMR-NB, -WB; GSM-EFR, -FR,

-HR;

Audio codec support:

MP3; AAC+, eAAC; AMR-NB, -WB, G.711, WMA9/10 Pro

USIM card

Dual cards dual standby

Transmission rate

LTE Category 4 - 150 Mbps (DL)

LTE Category 4 - 50 Mbps (UL)

Temperature range

Operating temperature: -25

℃

~ +75

℃

Storage temperature: -40℃~ +90℃

Physical dimension

Dimension: 40.5*40.5*2.8mm

Weight: 10.6g

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1.3. Pin

110

109

108

107

106

105

104

103

102

101

100

111

115

114

113

112

130

129

128

127

126

125

124

123

122

121

120

119

118

117

116

146

145

144

143

142

141

140

139

138

137

136

135

134

133

132

131

VBAT_BB

GND

MIC1P

GND_MIC

MIC2P

GND

EAR_P

SPK_M

SPK_P

USIM1_RST

USIM1_CLK

SD_LDO12

GPIO_23

TP_RST_N

USB_DP

GND

USB_DM

GND

USIM1_VDD

GND

USIM1_DET

PWM

TP_INT_N

USIM1_DATA

USB_ID

USIM2_DET

USIM2_RST

USIM2_CLK

VIB_DRV_N

USIM2_DATA

USIM2_VDD

ALSP_INT_N/GPIO_94

GPIO_98

GPIO_0

GPIO_110

GPIO_97

GPIO_68

GPIO_69

GPIO_89

GPIO_88

GPIO_92

GPIO_31

KEY_VOL_DOWN_N

CAM0_RST_N

UART2_TXD

SENSOR_I2C_SDA

SENSOR_I2C_SCL

GND

ANT_MAIN

GPIO_32

UART2_RXD

KEY_VOL_UP_N

CAM0_PWDN

GND

ANT-BT

GND

CAM1_MCLK

HPH_GND

HPH_R

HS_DET

HPH_L

USB_VBUS

GND

VBAT_THERM

VBAT_SNS

GND

ANT_DRX

GND

LDO17_2V85

ADC

CHARGE_SEL

VRTC

ANT_GNSS

GND

GPIO_8

GND

LDO6_1V8

GPIO_17

GPIO_16

GPIO_95

SD_DATA1

SD_DATA2

SD_DATA3

SD_CLK

SD_CMD

SD_DATA0

SD_DET/GPIO_38

TP_I2C_SCL

TP_I2C_SDA

SD_LDO11

LCD_RST_N

LCD_TE

GND

MIPI_DSI_CLK_M

MIPI_DSI_CLK_P

MIPI_DSI_LANE0M

MIPI_DSI_LANE0P

GND

MIPI_CSI0_CLK_M

USB_BOOT

SIM8905

UART1_CTS

UART1_RTS

UART1_RXD

UART1_TXD

MIPI_DSI_LANE3P

MIPI_DSI_LANE3M

MIPI_DSI_LANE2P

MIPI_DSI_LANE2M

MIPI_DSI_LANE1P

MIPI_DSI_LANE1M

MIPI_CSI0_LN1_P

MIPI_CSI0_LN1_M

MIPI_CSI0_LN0_P

MIPI_CSI0_LN0_M

MIPI_CSI0_CLK_P

MIPI_CSI1_CLK_M

MIPI_CSI1_CLK_P

MIPI_CSI1_LN0_M

MIPI_CSI1_LN0_P

GND

CAM0_MCLK

GND

CAM_I2C_SDA

CAM_I2C_SCL

CAM1_PWDN

CAM1_RST_N

ACCL_INT2_N/GPIO_65

MAG_INT_N/GPIO_36

LDO5_1V8

ACCL_INT1_N/GPIO_96

PWRKEY

GPIO_99

GPIO_58

GPIO_9

GPIO_10

GPIO_11

VBAT_RF

GND

USB_VBUS

147

EAR_M

GND

148

149

150

151

152

153

154

179

180

181

182

195

196

197

198

163

164

165

166

167

168

169

170

187

188

189

190

203

204

205

206

171

172

173

174

175

176

177

178

191

192

193

194

207

208

209

210

155 156 157 158 159 160 161 162

183 184 185 186

199 200 201 202

RESERVED

POWER

SDC2 USB Others UART USIM AUDIO

GND

GPIO Antenna TP LCM Camera

RESET

MIC_BIAS1

MIC_BIAS2

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1.4. Picture

Figure 1: Top and Bottom view of SIM8905A

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1.5. Dimension

Figure 2: Dimention

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2. Detail Block Diagram

MSM8909

eMMC flash +

LPDDR3

EBI1

SDC1

GPIO

Keypad Buttons

I2C

SPI

UART * 2

4 Lanes DSI

2 Lanes CSI

1 Lanes CSI

USB

UIM1

UIM2

SDC2

Earpiece

Microphone

Headset

TP/Sensor/Cam/others

Vibrator

Keypad Buttons

CODEC

Linear

Charger

Output Power

Management

PM8909

19.2M XO

PDM BUS

Primary Camera (8MP)

720P LCD

Secondary Camera (5MP)

USB HS (Support OTG)

UIM Card2

SD Card

UIM Card1

VBUS_5V

VBAT

ADC

Speaker

4G/3G/2G MODEM

Core

MODEM/Voice

Processor

GNSS

Baseband

Modem

Jolokia

WWAN RX I/Q

GSM Phase

WWAN TX I/Q

RFFE

GNSS I/Q

WTR4905

Front End

MMMB

Power

Amplifier

Modele

RFFE

party

PA+SW

DIVERSITY

SWITCH

MODULE

MAIN

DRX

BT/WIFI

Baseband

Codec Digital

Quad A7 w/ 512K L2

Camera ISP/VFE/Jpeg HW

Display Processor

Video

Graphics

Peripherals

SPMI BUS

Memory Support

Note2

Figure 3: Block diagram of SIM8905A

3. InterfaceApplication

Power Supply

The power supply pins of SIM8905A include VBAT_RF and VBAT_BB. VBAT_RF directly supplies the power

to RF PA; VBAT_BB supplies the power to the baseband system. The power supply of SIM8905A ranges from

3.4V to 4.4V, and 3.9V is recommended. It must be able to provide sufficient current up to 3A for the high-power

transmitting.

If the DC input voltage is +5V and customers do not care about the power efficiency, a high-current low-dropout

regulator is recommended. Figure 4 is the reference design.

Vin Vout

GND

PWR_CTRL

R102

R101

VBAT

100K

47K

+C103

330uF

C104

100nF

U101 MIC29302

C101 C102

100uF 1uF

DC INPUT

R103

470R

On/Off

Figure 4: LDO power supply reference circuit

Note: To ensure a proper behavior of the regulator under light load, an extra minimum load (R103 in Figure 4)

is required, because the current SIM8905A consumed is very small in sleep mode and power off mode. For

more details about minimum load, please refer to specification of MIC29302.

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To increase power efficiency, the switching mode DC-DC converter is preferable, especially when DC input

voltage is quite high. The following figure is the reference design, and it is recommended to reserve a proper

ferrite bead (FB101 in Figure 5) in series for EMI suppression.

Vin Vout

U101

LM2596- ADJ

100uH

MBR360

L101

C101

C102

D102 C103

R102

R101

FB101

330uF

VBAT

2.2K

100uF 1uF

C104

100nF

270R@100MHz

DC INPUT

PWR_CTRL

GND

On/Off

Figure 5: DC-DC power supply reference circuit

For battery-powered application, the 3.7V lithium battery can be connected to SIM8905A VBAT pins directly, but

other types of battery must be used carefully, since their maximum voltage may rise over the absolute maximum

voltage of the module. When battery is used, the total impedance between battery and VBAT pins should be less

than 150mΩ.

In any case mentioned above, at the VBAT input pins side, please take Figure 6 as a reference:

5.1V

500mW

33pF

VBAT

VBAT_BB

GND

C101

C103

100uF

Module

D101

C105

220uF

VBAT_RF

Figure 6: VBAT input reference circuit

Where C101 is a 100uF tantalum capacitor with low ESR; C105 is a 220uF tantalum capacitor with low ESR;

33pF and 10pF capacitors are used for eliminating the high frequency interference; 5.1V/500mW zener diode can

protect the module against voltage surge.

All of these components should be placed as close to VBAT pins as possible.

Table 1: Recommended zener diode

Vendor

Part number

Power(watts)

Packages

On semi

MMSZ5231BT1G

500mW

SOD123

Prisemi

PZ3D4V2H

500mW

SOD323

Vishay

MMSZ4689-V

500mW

SOD123

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Crownpo

CDZ55C5V1SM

500mW

0805

Power on/off

Power on

Users can power on SIM8905A by pulling down the PWRKEY pin for more than 2 second then release. This pin

is already pulled up to 1.8V internally, so external pull up is not necessary. Reference circuits are shown as below:

4.7K

47K

PWRKEY

1.8V

PMU

Module

Figure 7: Powered on/down module using transistor

PWRKEY

Module

1.8V

PMU

Figure 8: Powered on/down module using button

The power on sequence is illustrated in Figure9

Software Controlled

VBAT

PWRKEY

Others

t>2s

LDO5_1V8

LDO6_1V8

250us

175ms

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