Datasheet

712
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
34.11 Two-wire Interface (TWI) User Interface
Note: All unlisted offset values are considered as “reserved”.
Table 34-7. Register Mapping
Offset Register Name Access Reset
0x00 Control Register TWI_CR Write-only –
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
0x14–0x1C Reserved –––
0x20 Status Register TWI_SR Read-only 0x0000F009
0x24 Interrupt Enable Register TWI_IER Write-only –
0x28 Interrupt Disable Register TWI_IDR Write-only –
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
0xEC–0xFC Reserved – – –
0x100–0x128 Reserved for PDC registers – – –