h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 266
h8s-2138
Manufacturer Part Number
h8s-2138
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2138.pdf
(1061 pages)
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Section 8 I/O Ports
8.4.4
Port 3 has an on-chip MOS input pull-up function that can be controlled by software. This MOS
input pull-up function can be used in modes 2 and 3 (when EXPE = 0), and can be specified as on
or off on a bit-by-bit basis.
When a P3DDR bit is cleared to 0 in mode 2 or 3 (when EXPE = 0), setting the corresponding
P3PCR bit to 1 turns on the MOS input pull-up for that pin.
The MOS input pull-up function is in the off state after a reset and in hardware standby mode. The
prior state is retained in software standby mode.
Table 8.8 summarizes the MOS input pull-up states.
Table 8.8
Mode
1, 2, 3 (EXPE = 1)
2, 3 (EXPE = 0)
Legend:
Off:
On/Off: On when P3DDR = 0 and P3PCR = 1; otherwise off.
Rev. 4.00 Jun 06, 2006 page 212 of 1004
REJ09B0301-0400
MOS input pull-up is always off.
MOS Input Pull-Up Function
MOS Input Pull-Up States (Port 3)
Off
Reset
Off
Hardware
Standby Mode
Off
Off
Software
Standby Mode
Off
On/Off
In Other
Operations
Off
On/Off
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