10 two-wire interface (twi) user interface – Rainbow Electronics AT91CAP9S250A User Manual
Page 510
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510
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
34.10 Two-wire Interface (TWI) User Interface
Table 34-5.
Two-wire Interface (TWI) User Interface
Offset
Register
Name
Access Reset
State
0x00
Control Register
TWI_CR
Write-only
N / A
0x04
Master Mode Register
TWI_MMR
Read/Write
0x00000000
0x08
Slave Mode Register
TWI_SMR
Read/Write
0x00000000
0x0C
Internal Address Register
TWI_IADR
Read/Write
0x00000000
0x10
Clock Waveform Generator Register
TWI_CWGR
Read/Write
0x00000000
0x20
Status Register
TWI_SR
Read-only
0x0000F009
0x24
Interrupt Enable Register
TWI_IER
Write-only
N / A
0x28
Interrupt Disable Register
TWI_IDR
Write-only
N / A
0x2C
Interrupt Mask Register
TWI_IMR
Read-only
0x00000000
0x30
Receive Holding Register
TWI_RHR
Read-only
0x00000000
0x34
Transmit Holding Register
TWI_THR
Write-only
0x00000000
0x38 - 0xFC
Reserved
–
–
–
0x100 - 0x124
Reserved for the PDC
–
–
–