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RELEASE
Revision B1
©Serious Integrated, Inc.
39
I2C DEVICE SUMMARY
Numerous devices on the SIM share the primary I2C bus:
Schematic
Signal Name
Description
MCU
Name
PE3/SDA1
I2C Serial Data
PE3/SDA1
PE2/SCL1
I2C Serial Clock
PE2/SCL1
Each device has a unique I2C address and maximum I2C frequency as follows:
Device
Description
Max Freq
(KHz)
7-Bit
Address
Read
Byte
Write
Byte
SX86XX
Touch Controller
400
1001000
0x91
0x90
PCF8523TK
RTCC
1000
1101000
0xD1
0xD0
SI5351
Clock Synthesizer
400
1100000
0xC1
0xC0
NCT75
Temperature Sensor
400
1001001
0x93
0x92
ATSHA204
Security/EEPROM
1000
1100100
0xC9
0xC8
CAT34C02
EEPROM on SCM117
400
1010000
0xA1
0xA0
INTERRUPT SUMMARY
The following devices external to the SH7269 are connected to interrupt inputs on the processor:
Device
Description
Interrupt Purpose
Interrupt
SW1
Pushbutton
When button pressed
PF16/IRQ4-SW1#
SX8656
Touch Controller
Touch event
PF17/IRQ5-TOUCH_IRQ#
NCT75
Temperature Sensor
Temperature threshold
PH7/PINT7-TEMPALERT#
FT313H
USB Host Controller
USB host event
PJ21/IRQ1-USB_IRQ#
J8.15
16-pin Power/Communications Connector
Host device SPI data
ready*
PJ22/IRQ2-PH5/AN5
J7.42
60-Pin Board-to-Board Expansion Connector
J7.19
60-Pin Board-to-Board Expansion Connector
TBD
PJ23/IRQ3
*The
Serious
SHIPBridge protocol, when used over the SPI port communicating between the SIM and the connected host,
uses this interrupt to signal data ready by the host device.
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