H8S2245 datasheet(300/818 Pages) RENESAS

300 / 818 page

Section 8 I/O Ports

Rev.3.00 Mar. 26, 2007 Page 258 of 772

REJ09B0355-0300

PC7

PC6

PC5

PC4

PC3

PC2

PC1

PC0

Port C

(I/O)

Figure 8.17 Port C Pin Functions (Modes 3 and 7)

8.9.4

MOS Input Pull-Up Function

Port C 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 2, 3, 6, and 7, and can be specified as on or off on an

individual bit basis.

When a PCDDR bit is cleared to 0 in mode 2, 3, 6, or 7, setting the corresponding PCPCR 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.

Note:

Modes 2, 3, 6, and 7 cannot be used in the H8S/2240.

Table 8.16 summarizes the MOS input pull-up states.

Table 8.16

MOS Input Pull-Up States (Port C)

Modes

Power-On

Reset

Hardware

Standby Mode

Manual

Reset

Software

Standby Mode

In Other

Operations

1, 4, 5

OFF

2, 3, 6, 7

ON/OFF

Legend:

OFF:

MOS input pull-up is always off.

ON/OFF: On when PCDDR = 0 and PCPCR = 1; otherwise off.

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