FM32L278/L276/L274/L272 - 3V I2C Companion
Register Description
Address Description
18h
Serial Number Byte 7
D7
SN.63
D6
SN.62
D5
SN.61
D4
SN.60
D3
SN.59
D2
SN.58
D1
SN.57
D0
SN.56
Upper byte of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
17h
Serial Number Byte 6
D7
SN.55
D6
SN.54
D5
SN.53
D4
SN.52
D3
SN.51
D2
SN.50
D1
SN.49
D0
SN.48
Byte 6 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
16h
Serial Number Byte 5
D7
SN.47
D6
SN.46
D5
SN.45
D4
SN.44
D3
SN.43
D2
SN.42
D1
SN.41
D0
SN.40
Byte 5 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
15h
Serial Number Byte 4
D7
SN.39
D6
SN.38
D5
SN.37
D4
SN.36
D3
SN.35
D2
SN.34
D1
SN.33
D0
SN.32
Byte 4 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
14h
Serial Number Byte 3
D7
SN.31
D6
SN.30
D5
SN.29
D4
SN.28
D3
SN.27
D2
SN.26
D1
SN.25
D0
SN.24
Byte 3 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
13h
Serial Number Byte 2
D7
SN.23
D6
SN.22
D5
SN.21
D4
SN.20
D3
SN.19
D2
SN.18
D1
SN.17
D0
SN.16
Byte 2 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
12h
Serial Number Byte 1
D7
SN.15
D6
SN.14
D5
SN.13
D4
SN.12
D3
SN.11
D2
SN.10
D1
SN.9
D0
SN.8
Byte 1 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
11h
Serial Number Byte 0
D7
SN.7
D6
SN.6
D5
SN.5
D4
SN.4
D3
SN.3
D2
SN.2
D1
SN.1
D0
SN.0
LSB of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
10h
Counter 2 MSB
D7
C2.15
D6
C2.14
D5
C2.13
D4
C2.12
D3
C2.11
D2
C2.10
D1
C2.9
D0
C2.8
Event Counter 2 MSB. Increments on overflows from Counter 2 LSB. Battery-backed, read/write.
0Fh
Counter 2 LSB
D7
C2.7
D6
C2.6
D5
C2.5
D4
C2.4
D3
C2.3
D2
C2.2
D1
C2.1
D0
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 .
0Eh
Counter 1 MSB
D7
C1.15
D6
C1.14
D5
C1.13
D4
C1.12
D3
C1.11
D2
C1.10
D1
C1.9
D0
C1.8
Event Counter 1 MSB. Increments on overflows from Counter 1 LSB. Battery-backed, read/write.
0Dh
Counter 1 LSB
D7
C1.7
D6
C1.6
D5
C1.5
D4
C1.4
D3
C1.3
D2
C1.2
D1
C1.1
D0
C1.0
Event Counter 1 LSB. Increments on programmed edge event on CNT1 input. Battery-backed, read/write.
Rev. 3.0
Feb. 2009
Page 8 of 21
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
