Datasheet

78K0/Ix2 CHAPTER 4 PORT FUNCTIONS
R01UH0010EJ0500 Rev.5.00 133
Feb 28, 2012
Figure 4-24. Block Diagram of P125
(1) 78K0/IY2
P125/RESET/<TI000>/<INTP0>
WR
PU
RD
PU125
V DD
P-ch
PU12
Internal reset
RSTM
RSTMASK
WR PM
INTP0SEL1 TM00SEL0INTP0SEL0
MUXSEL
TM00SEL1
Alternate
function
Internal bus
(2) 78K0/IA2, 78K0/IB2
P125/RESET
WR
PU
RD
PU125
VDD
P-ch
PU12
Internal reset
RSTM
RSTMASK
WRPM
Internal bus
PU12: Pull-up resistor option register 12
RSTMASK: Reset pin mode register
MUXSEL: Port alternate switch control register
RD: Read signal
WR: Write signal
Caution Because RESET/P125 immediately after release of reset is set in the external reset input, if a reset
signal is generated during low level input, the reset status continues until the input rises to the high
level.
Remark After reset, the external reset function and the pull-up resistor are enabled (RSTM = 0, PU125 = 1). Set
RSTM bit to 1 when using as a port function.