Toshiba H1 Series - Manual (Page 158)

TMP92CZ26A
92CZ26A-155
3.7.16 Port N (PN0 to PN7)
PN0 to PN7 are 8-bit general-purpose I/O port. Each bit can be set individually for input
or output. Resetting sets Port N to an input port. In addition to functioning as a
general-purpose I/O port, Port N can also function as interface pin for key-board (KO0 to
KO7). This function can set to open-drain type output buffer.
Figure 3.7.42 Port N
Selector
A
B S
PN0(KO0) to PN7(KO7)
PC read
Direction
control
(on bit basis)
PNCR write
Function
control
(on bit basis)
PNFC write
S
Output latch
PN write
Reset
Open-drain
enable
Internal data b
us