Port A Mos Input Pull-Up States - Hitachi H8S/2378, H8S/2378R Series Hardware Manual

PA3/A19, PA2/A18, PA1/A17, PA20/A16
The pin function is switched as shown below according to the operating mode, bit EXPE, bits
A19E to A16E, and bit PADDR.
Operating 1, 2, 5,
mode 6
EXPE —
AxxE —
PADDR — 0
Pin Address PA
function output input
xx = 19 to 16
10.9.8

Port A MOS Input Pull-Up States

Port A has a built-in MOS input pull-up function that can be controlled by software. This MOS
input pull-up function can be used by pins PA7 to PA5 in modes 1, 2, 5, and 6, and by all pins in
modes 4, and 7. MOS input pull-up can be specified as on or off on a bit-by-bit basis.
Table 10.2 summarizes the MOS input pull-up states.
Table 10.2 MOS Input Pull-Up States (Port A)
Mode
4, 7 PA7 to PA0
1, 2, 5, 6 PA7 to PA5
PA4 to PA0
Legend:
Off: MOS input pull-up is always off.
On/Off: On when PADDR = 0 and PAPCR = 1; otherwise off.
4
—
0 1
1 0 1
PA PA Address
output input output
Reset
Off
7
0
— 0
0 1 0
PA PA PA
input output input
Hardware Software
Standby Mode Standby Mode
Off On/Off
On/Off
Off
1
1
1 0 1
PA PA Address
output input output
In Other
Operations
On/Off
On/Off
Off
Rev. 1.0, 09/01, page 459 of 904