
HD404639R Series
43
MIS3
Input control signal
V
CC
Pull-up
MOS
DCD, DCR
PDR
Input data
V
CC
HLT
Pull-up control signal
Buffer control signal
Output data
D
4
–D
11
, R port
Figure 27-1 I/O Buffer Configuration (with Pull-Up MOS)
Table 21-2 Programmable I/O Circuits (with Pull-Down MOS)
MIS3 (Bit 3 of MIS)
0
1
DCD, DCR
0
1
0
1
PDR
0
1
0
1
0
1
0
1
CMOS buffer
PMOS
—
—
—
On
—
—
—
On
NMOS
—
—
On
—
—
—
On
—
Pull-down MOS
Note:
— indicates off status.
—
—
—
—
On
—
On
—