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HD151TS207SS
Rev.1.00, Apr.25.2003, page 8 of 38
I
2
C Controlled Register Bit Map (cont.)
Table3 FS_A and FS_B pin Input level
Logic Level Min Voltage Max Voltage
0 (Low) 0.35V
1 (High) 0.70V
Byte1 Control Register
Bit Description Contents Type Default Note
7 Allow control of SCR with assertion
of PCI_STOP#
0 = Free running
1 = Stopped with
PCI_STOP#
RW 0 See
Table5
6 SRC Output enable 0 = Disabled (tristate)
1 = Enabled
RW 1
5 Reserved RW 1
4 Reserved RW 1
3 Reserved RW 1
2 CPU2 Output enable 0 = Disabled (tristate)
1 = Enabled
RW 1
1 CPU1 Output enable 0 = Disabled (tristate)
1 = Enabled
RW 1
0 CPU0 Output enable 0 = Disabled (tristate)
1 = Enabled
RW 1
Byte2 Control Register
Bit Description Contents Type Default Note
7 SRC_Pwrdwn drive mode 0 = Driven in power down,
1 = Tristate
RW 0
6 SRC_Stop drive mode 0 = Driven when stopped,
1 = Tristate
RW 0
See
Table5
5 CPU2_Pwrdwn drive mode 0 = Driven in power down,
1 = Tristate
RW 0
4 CPU1_Pwrdwn drive mode 0 = Driven in power down,
1 = Tristate
RW 0
3 CPU0_Pwrdwn drive mode 0 = Driven in power down,
1 = Tristate
RW 0
2 Reserved RW 0
1 Reserved RW 0
0 Reserved RW 0
See
Table4