Datasheet

Section 8 I/O Ports
Rev. 4.00 Sep 27, 2006 page 249 of 1130
REJ09B0327-0400
System Control Register 2 (SYSCR2) (H8S/2148 Group and H8S/2147N Only)
Bit 76543210
KWUL1 KWUL0 P6PUE — SDE CS4E CS3E HI12E
Initial value00000000
Read/Write R/W R/W R/W — R/W R/W R/W R/W
SYSCR2 is an 8-bit readable/writable register that controls port 6 input level selection and the
operation of host interface functions.
Only bits 7, 6, and 5 are described here. See section 18.2.2, System Control Register 2 (SYSCR2),
for information on bits 4 to 0.
SYSCR2 is initialized to H'00 by a reset and in hardware standby mode.
Bits 7 and 6—Key Wakeup Level 1 and 0 (KWUL1, KWUL0): The port 6 input level setting
can be changed by software, using these bits. The setting of these bits also changes the input level
of the pin functions multiplexed with port 6.
Bit 7 Bit 6
KWUL1 KWUL0 Description
0 0 Standard input level is selected as port 6 input level (Initial value)
1 Input level 1 is selected as port 6 input level
1 0 Input level 2 is selected as port 6 input level
1 Input level 3 is selected as port 6 input level
Bit 5—Port 6 Input Pull-Up Extra (P6PUE): Controls and selects the current specification for
the port 6 MOS input pull-up function connected by means of KMPCR settings.
Bit 5
P6PUE Description
0 Standard current specification is selected for port 6 MOS input pull-up function
(Initial value)
1 Current-limit specification is selected for port 6 MOS input pull-up function