MAX1601 Datasheet, PDF (13/16 Pages) Maxim Integrated Products – Dual-Channel CardBus and PCMCIA Power Switches with SMBus™ Serial Interface

Dual-Channel CardBus and PCMCIA
Power Switches with SMBus™ Serial Interface
Table 3. Command Format for Channel B Write Operations (address 1010001 or 1010011)
BIT
7 (MSB)
6
5
4
3
2
1
0 (LSB)
NAME POR STATE
FUNCTION
OP/SUS
0
Operate/suspend bit. Selects which latch receives data: high = operation,
low = suspend.
VCCBON
0
Turns on VCCB when high, pulls VCCB to GND when low.
VCCB3/5
0
If VCCB is on, a high connects VY to VCCB, and a low connects VX to VCCB.
VCCBHIZ
0
Puts VCCB in a high-impedance state when high. Overrides VCCBON.
VPPBON
0
Turns on VPPB when high, pulls VPPB to GND when low.
VPPBPGM
0
If VPPB is on, a high connects VPPB to 12INB, and a low connects VPPB to VCCB.
VPPBHIZ
0
Puts VPPB in a high-impedance state when high. Overrides VPPBON.
RFU
0
Reserved for future use.
Table 4. Read Format for Interrupt Pointer Address (0001100)
BIT
7 (MSB)
6
5
4
3
2
1
0 (LSB)
NAME
ADD7
ADD6
ADD5
ADD4
ADD3
ADD2
ADD1
ADD0
POR STATE
0
0
0
0
0
0
0
0
FUNCTION
ADD7 to ADD1 provide a return address for any interrupt query. For these devices, the
return addresses are:
1010000 = Channel A, ADD = low
1010001 = Channel B, ADD = low
1010010 = Channel A, ADD = high
1010011 = Channel B, ADD = high
Table 5. Read Format for Power Switch Address (1010000 or 1010010)
BIT
7 (MSB)
6
5
4
3
2
1
0 (LSB)
NAME POR STATE
CATFAULT
0
FAULT1
0
FAULT2
0
FAULT3
0
FAULT4
0
SIG/DUAL
0
RFU
0
RFU
0
LATCHED?
Y
Y
Y
Y
Y
N
N
N
FUNCTION
Indicates catastrophic (thermal or undervoltage lockout) fault when high.
Indicates VCCA overcurrent/undervoltage lockout when high.
Indicates VPPA overcurrent/undervoltage lockout when high.
Indicates VCCB overcurrent/undervoltage lockout when high.
Indicates VPPB overcurrent/undervoltage lockout when high.
Indicates dual part (single-channel devices would read 1).
Reserved for future use.
Reserved for future use.
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