HD404459 Datasheet, PDF (47/122 Pages) Renesas Technology Corp – 4-bit HMCS400-series microcomputers

HD404459 Series
Table 23 Programmable I/O Circuits
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-up MOS
—
—
—
—
—
On
—
On
Note: — indicates off status.
V_CC
V_CC
Pull-up
MOS
Pull-up control signal
HLT
MIS3
Buffer control signal
DCD, DCR
Output data
PDR
Input data
Input control signal
Figure 29 I/O Buffer Configuration
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