Cypress FM33256B, Руководство пользователя

Страница: 14 / 26

FM33256B
Document Number: 001-86213 Rev. *C Page 13 of 39
Register Map
The RTC and processor companion functions are accessed via 30 special function registers, which are mapped to unique opcodes.
The interface protocol is described on
page 23 . The registers contain timekeeping data, alarm settings, control bits, and information
flags. A description of each register follows the summary table.
Note When the device is first powered up and programmed, all timekeeping registers must be written because the battery-backed
register values cannot be guaranteed. The table below shows the default values of the non-volatile registers and some of the
battery-backed bits. All other register values should be treated as unknown.
Table 5. Register Map Summary Table
Address
Data
Function Range
D7 D6 D5 D4 D3 D2 D1 D0
1Dh M 0 0 Alarm 10
months
Alarm months Alarm Month 01-12
1Ch M 0 Alarm 10 date Alarm date Alarm Date 01-31
1Bh M 0 Alarm 10 hours Alarm hours Alarm Hours 00-23
1Ah M Alarm 10 minutes Alarm minutes Alarm Minutes 00-59
19h M Alarm 10 seconds Alarm seconds Alarm Seconds 00-59
18h SNL AL/SW F1 F0 VBC FC VTP1 VTP0 Companion Control
17h Serial Number Byte 7 Serial Number 7 FFh
16h Serial Number Byte 6 Serial Number 6 FFh
15h Serial Number Byte 5 Serial Number 5 FFh
14h Serial Number Byte 4 Serial Number 4 FFh
13h Serial Number Byte 3 Serial Number 3 FFh
12h Serial Number Byte 2 Serial Number 2 FFh
11h Serial Number Byte 1 Serial Number 1 FFh
10h Serial Number Byte 0 Serial Number 0 FFh
0Fh Event Counter Byte 1 Event Counter 1 FFh
0Eh Event Counter Byte 0 Event Counter 0 FFh
0Dh NVC - - - RC WC POLL CP Event Counter
Control
0Ch WDE - - WDET4 WDET3 WDET2 WDET1 WDET0 Watchdog Control
0Bh - - - WDST4 WDST3 WDST2 WDST1 WDST0 Watchdog Control
0Ah - - - - WR3 WR2 WR1 WR0 Watchdog Restart
09h EWDF LWDF POR LB - - - - Watchdog Flags
08h 10 years years Years 00-99
07h 0 0 0 10 months months Month 01-12
06h 0 0 10 date date Date 01-31
05h 0 0 0 0 0 day Day 01-07
04h 0 0 10 hours hours Hours 00-23
03h 0 10 minutes minutes Minutes 00-59
02h 0 10 seconds seconds Seconds 00-59
01h - - CALS CAL4 CAL3 CAL2 CAL1 CAL0 CAL/Control
00h OSCEN AF CF AEN reserved CAL W R RTC/Alarm Control
Battery-backed = Nonvolatile = BB/NV User Programmable =