HD64F2638F20J Datasheet, PDF (309/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Section 9 I/O Ports
Port A
PA3 (I/O) / SCK2 (I/O)
PA2 (I/O) / RxD2 (input)
PA1 (I/O) / TxD2 (output)
PA0 (I/O)
Figure 9-7 Port A Pin Functions (Mode 7)
9.6.5 MOS Input Pull-Up Function
Port A has an on-chip MOS input pull-up function that can be controlled by software. MOS input
pull-up can be specified as on or off on an individual bit basis.
In modes 4 to 6, if a pin is in the input state in accordance with the settings in PFCR, in the SCI’s
SCMR, SMR, and SCR, and in DDR, setting the corresponding PAPCR bit to 1 turns on the MOS
input pull-up for that pin.
In mode 7, if a pin is in the input state in accordance with the settings in the SCI’s SCMR, SMR,
and SCR, and in DDR, setting the corresponding PAPCR 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 9-10summarizes the MOS input pull-up states.
Table 9-10 MOS Input Pull-Up States (Port A)
Pin States
Reset
Hardware
Standby Mode
Software
Standby Mode
Address output or
SCI output
OFF
OFF
OFF
Other than above
ON/OFF
Legend:
OFF: MOS input pull-up is always off.
ON/OFF: On when PADDR = 0 and PAPCR = 1; otherwise off.
In Other
Operations
OFF
ON/OFF
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Page 259 of 1458