Rainbow Electronics AT73C246 - Manual (Page 40)

40
11050A–PMAAC–07-Apr-10
AT73C246
11.10 Real Time Clock (RTC) User Interface
Figure 11-10. RTC Block Diagram
Note: 1. Values in the Version Register vary with the version of the IP block implementation.
RTC ADDR
RTC DATA 3 RTC DATA 2 RTC DATA 1 RTC DATA 0
CONTROL REGISTER
STATUS CLEAR COMMAND REGISTER
MODE REGISTER
TIME REGISTER
CALENDAR REGISTER
TIME ALARM REGISTER
CALENDAR ALARM REGISTER
STATUS REGISTER
INTERRUPT ENABLE REGISTER
INTERRUPT DISABLE REGISTER
INTERRUPT MASK REGISTER
VALID ENTRY REGISTER
VERSION REGISTER
RESERVED REGISTER
RTC
CTRL
RTC_SEL
RTC_EN
RTC_WRITE
RTC
Table 11-9. Register Mapping
Offset Register Name Access Reset
0x00 Control Register RTC_CR Read-write 0x0
0x04 Mode Register RTC_MR Read-write 0x0
0x08 Time Register RTC_TIMR Read-write 0x0
0x0C Calendar Register RTC_CALR Read-write 0x01819819
0x10 Time Alarm Register RTC_TIMALR Read-write 0x0
0x14 Calendar Alarm Register RTC_CALALR Read-write 0x01010000
0x18 Status Register RTC_SR Read-only 0x0
0x1C Status Clear Command Register RTC_SCCR Write-only ---
0x20 Interrupt Enable Register RTC_IER Write-only ---
0x24 Interrupt Disable Register RTC_IDR Write-only ---
0x28 Interrupt Mask Register RTC_IMR Read-only 0x0
0x2C Valid Entry Register RTC_VER Read-only 0x0
0xFC Version Register (1) RTC_VERSION Read-only ---
0xFC Reserved Register --- --- ---