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FM31T376-G 参数 Datasheet PDF下载

FM31T376-G图片预览
型号: FM31T376-G
PDF下载: 下载PDF文件 查看货源
内容描述: 系统监控器和温度补偿实时时钟( TCXO )与内嵌晶体 [System Supervisor & Temperature Compensated RTC(TCXO) with Embedded Crystal]
分类和应用: 晶体电源电路电源管理电路石英晶振温度补偿晶振光电二极管监控时钟
文件页数/大小: 26 页 / 796 K
品牌: RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
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FM31T372/374/376/378-G  
Register Map  
The TCXO and processor companion functions are accessed via 25 special function registers mapped to a separate  
2-wire device ID. The interface protocol is described below. The registers contain timekeeping data, control bits, or  
information flags. A description of each register follows the summary table below.  
Register Map Summary Table  
Nonvolatile =  
Battery-backed =  
Data  
D7  
D6  
D5  
D4  
D3  
D2  
D1  
D0  
Function  
Range  
FFh  
FFh  
FFh  
FFh  
FFh  
FFh  
FFh  
FFh  
FFh  
FFh  
FFh  
FFh  
Address  
18h  
17h  
16h  
15h  
14h  
13h  
12h  
11h  
Serial Number Byte 7  
Serial Number Byte 6  
Serial Number Byte 5  
Serial Number Byte 4  
Serial Number Byte 3  
Serial Number Byte 2  
Serial Number Byte 1  
Serial Number Byte 0  
Counter 2 MSB  
Serial Number 7  
Serial Number 6  
Serial Number 5  
Serial Number 4  
Serial Number 3  
Serial Number 2  
Serial Number 1  
Serial Number 0  
Event Counter 2 MSB  
Event Counter 2 LSB  
Event Counter 1 MSB  
Event Counter 1 LSB  
Event Count Control  
10h  
Counter 2 LSB  
Counter 1 MSB  
Counter 1 LSB  
0Fh  
0Eh  
0Dh  
0Ch  
0Bh  
0Ah  
09h  
08h  
07h  
06h  
05h  
04h  
03h  
02h  
01h  
00h  
RC  
CC  
VBC  
WDT2  
WR2  
C2P  
VTP1  
WDT1  
WR1  
C1P  
SNL  
WDE  
WTR  
FOEN  
-
POR  
FC  
-
LB  
WP1  
WDT4  
-
WP0  
WDT3  
WR3  
VTP0 Companion Control  
WDT0 Watchdog Control  
WR0  
Watchdog Restart/Flags  
Years  
Month  
Date  
00-99  
1-12  
1-31  
1-7  
0-23  
0-59  
0-59  
10 years  
years  
months  
date  
0
0
0
0
0
0
0
0
0
0
0
0
10 mo  
10 date  
0
0
Day  
day  
Hours  
Minutes  
Seconds  
10 hours  
hours  
minutes  
seconds  
10 minutes  
10 seconds  
CAL5  
/OSCEN  
reserved  
CALS  
CF  
CAL4  
CAL3  
CAL2  
CAL  
CAL1  
W
CAL0 OSC/CAL Control  
RTC Control  
reserved reserved reserved  
R
Note: When the device is first powered up and programmed, all 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. All other register values should be treated as unknown.  
Default Register Values  
Address  
18h  
17h  
16h  
15h  
14h  
13h  
12h  
11h  
0Bh  
0Ah  
01h  
Hex Value  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x40  
0x1F  
Factory  
programmed  
Rev. 1.1  
Apr. 2011  
Page 11 of 26  
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