W55P241 Datasheet, PDF (10/32 Pages) List of Unclassifed Manufacturers – I/O device usable with many different microprocessors through SPI interface

W55P241
Input with pull-high resistor
A=1, D=0, B=1
PIN
Pad
(bit)
Input with high impedance
A=0 or 1, D=0, B=0
PIN
Pad
Input with pull-low resistor
A=0, D=0, B=1
PIN
Pad
Figure 5 Pure input
5.2.2 Input With Pull-High Resistor
When Attribute bit = 1, Direction bit = 0 and Buffer bit = 1, the pad is in pull-high input mode. Pin bit is
1 when no external H/W is connected or the pad is forced to “1” by external H/W. Pin bit is 0 when the
pad is forced to “0” by external H/W.
5.2.3 Input With Pull-Low Resistor
When Attribute bit = 0, Direction bit = 0 and Buffer bit = 1, the pad is in pull-low input mode. Pin bit is
0 when no external H/W is connected or the pad is forced to “0” by external H/W. Pin bit is 1 when the
pad is forced to 1 by external H/W.
5.2.4 CMOS Output
When Attribute bit = 0 and Direction bit = 1, the pad is in CMOS output mode and the Buffer bit
determines the state of the pad. If Buffer bit = 0, the pad will be set to “0”. If Buffer bit = 1, the pad will
be set to “1”. Pin bit directly indicates pad status.
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