H8-3006 Datasheet, PDF (690/796 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer

Appendix B Internal I/O Registers
RTCNT⎯Refresh Timer Counter
H'EE029
DRAM interface
Bit
7
6
5
4
3
2
1
0
Initial value
Read/Write
0
0
0
0
0
0
0
0
R/W R/W R/W R/W R/W R/W R/W R/W
Incremented by internal clock selected
by bits CKS2 to CKS0 in RTMCSR
RTCOR⎯Refresh Time Constant Register
Bit
7
6
5
H'EE02A
4
3
2
DRAM interface
1
0
Initial value
1
1
1
1
1
1
1
1
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
RTCNT compare match period
Note: Only byte access should be used with this register.
P4PCR⎯Port 4 Input Pull-Up Control Register H'EE03E
Port 4
Bit
7
6
5
4
3
2
1
0
P47PCR P46PCR P45PCR P44PCR P43PCR P42PCR P41PCR P40PCR
Initial value
0
0
0
0
0
0
0
0
Read/Write ^R/W
R/W
R/W
R/W
R/W
R/W
R/W R/W
Port 4 input pull-up control 7 to 0
0 Input pull-up transistor is off
1 Input pull-up transistor is on
Note: Valid when the corresponding P4DDR bit is cleared to 0
(designating generic input).
Rev.5.00 Sep. 12, 2007 Page 662 of 764
REJ09B0396-0500