FM31278/276/274/272 - 5V I2C Companion
Register Description
Address Description
18h
17h
16h
15h
14h
13h
12h
11h
10h
0Fh
Serial Number Byte 7
D7
D6
D5
D4
D3
D2
D1
D0
SN.63
SN.62
SN.61
SN.60
SN.59
SN.58
SN.57
SN.56
Upper byte of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 6
D7
D6
D5
D4
D3
D2
D1
D0
SN.55
SN.54
SN.53
SN.52
SN.51
SN.50
SN.49
SN.48
Byte 6 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 5
D7
D6
D5
D4
D3
D2
D1
D0
SN.47
SN.46
SN.45
SN.44
SN.43
SN.42
SN.41
SN.40
Byte 5 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 4
D7
D6
D5
D4
D3
D2
D1
D0
SN.39
SN.38
SN.37
SN.36
SN.35
SN.34
SN.33
SN.32
Byte 4 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 3
D7
D6
D5
D4
D3
D2
D1
D0
SN.31
SN.30
SN.29
SN.28
SN.27
SN.26
SN.25
SN.24
Byte 3 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 2
D7
D6
D5
D4
D3
D2
D1
D0
SN.23
SN.22
SN.21
SN.20
SN.19
SN.18
SN.17
SN.16
Byte 2 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 1
D7
D6
D5
D4
D3
D2
D1
D0
SN.15
SN.14
SN.13
SN.12
SN.11
SN.10
SN.9
SN.8
Byte 1 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 0
D7
D6
D5
D4
D3
D2
D1
D0
SN.7
SN.6
SN.5
SN.4
SN.3
SN.2
SN.1
SN.0
LSB of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Counter 2 MSB
D7
D6
D5
D4
D3
D2
D1
D0
C2.15
C2.14
C2.13
C2.12
C2.11
C2.10
C2.9
C2.8
Event Counter 2 MSB. Increments on overflows from Counter 2 LSB. Battery-backed, read/write.
Counter 2 LSB
D7
D6
D5
D4
D3
D2
D1
D0
C2.7
C2.6
C2.5
C2.4
C2.3
C2.2
C2.1
C2.0
Event Counter 2 LSB. Increments on programmed edge event on CNT2 input or overflows from Counter 1 MSB
when CC=1. Battery-backed, read/write .
Counter 1 MSB
0Eh
0Dh
D7
D6
D5
D4
D3
D2
D1
D0
C1.15
C1.14
C1.13
C1.12
C1.11
C1.10
C1.9
C1.8
Event Counter 1 MSB. Increments on overflows from Counter 1 LSB. Battery-backed, read/write.
Counter 1 LSB
D7
D6
D5
D4
D3
D2
D1
D0
C1.7
C1.6
C1.5
C1.4
C1.3
C1.2
C1.1
C1.0
Event Counter 1 LSB. Increments on programmed edge event on CNT1 input. Battery-backed, read/write.
Rev. 2.0
Dec. 2007
Page 11 of 25
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
