HD6432633 Datasheet, PDF (554/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

Mode 7: In mode 7, port E pins function as I/O ports. Input or output can be specified for each pin
on a bit-by-bit basis. Setting a PEDDR bit to 1 makes the corresponding port E pin an output port,
while clearing the bit to 0 makes the pin an input port.
Port E pin functions in mode 7 are shown in figure 10B-21.
Port E
PE7 (I/O)
PE6 (I/O)
PE5 (I/O)
PE4 (I/O)
PE3 (I/O)
PE2 (I/O)
PE1 (I/O)
PE0 (I/O)
Figure 10B-21 Port E Pin Functions (Mode 7)
10B.11.4 MOS Input Pull-Up Function
Port E has a built-in MOS input pull-up function that can be controlled by software. This MOS
input pull-up function can be used in modes 4 to 6 when 8-bit bus mode is selected, or in mode 7,
and can be specified as on or off on an individual bit basis.
When a PEDDR bit is cleared to 0 in modes 4 to 6 when 8-bit bus mode is selected, or in mode 7,
setting the corresponding PEPCR 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 power-on reset, and in hardware standby
mode. The prior state is retained by a manual reset or in software standby mode.
Table 10B-19 summarizes the MOS input pull-up states.
Table 10B-19 MOS Input Pull-Up States (Port E)
Modes
Power-On Hardware
Manual
Reset
Standby Mode Reset
7
OFF
OFF
ON/OFF
4 to 6 8-bit bus
16-bit bus
OFF
Legend:
OFF : MOS input pull-up is always off.
ON/OFF : On when PEDDR = 0 and PEPCR = 1; otherwise off.
Software
Standby Mode
ON/OFF
In Other
Operations
ON/OFF
OFF
OFF
500