HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 259

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

8.6.4
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 in modes 1, 2, 3, 6, and 7*, and cannot be used in modes 4 and
5. MOS input pull-up can be specified as on or off on an individual bit basis.
When a PADDR bit is cleared to 0, 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 power-on reset, and in hardware standby
mode. The prior state is retained after a manual reset, and in software standby mode.
Table 8.10 summarizes the MOS input pull-up states.
Table 8.10 MOS Input Pull-Up States (Port A)
Modes
1 to 3, 6, 7* PA
4, 5
Legend:
OFF
ON/OFF : On when PADDR = 0 and PAPCR = 1; otherwise off.
Note: * Modes 1 to 3 are not available on the F-ZTAT version.
242
Modes 2, 3, 6, and 7 are not available on the ROMless version.
MOS Input Pull-Up Function
: MOS input pull-up is always off.
PA
3
3
to PA
to PA
0
0
Port A
Figure 8.8 Port A Pin Functions (Mode 6)*
Power-On
Reset
OFF
Hardware
Standby Mode
When PADDR = 1
A
A
A
A
19
18
17
16
(output)
(output)
(output)
(output)
Manual
Reset
ON/OFF
OFF
When PADDR = 0
PA
PA
PA
PA
3
2
1
0
(input)
(input)
(input)
(input)
Software
Standby Mode
In Other
Operations