HD6413008VF25 Datasheet, PDF (590/688 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Appendix B Internal I/O Registers
BRCR—Bus Release Control Register
H'EE013
Bit
7
6
5
4
3
2
A23E A22E A21E A20E
⎯
⎯
Modes Initial value
1
1
1
1
1
1
1 and 2 Read/Write
⎯
⎯
⎯
⎯
⎯
⎯
Modes Initial value
1
1
1
0
1
1
3 and 4 Read/Write R/W
R/W
R/W
⎯
⎯
⎯
Bus controller
1
0
⎯
BRLE
1
0
⎯
R/W
1
0
⎯
R/W
Address 23 to 20 enable
0 Address output
1 Other input/output
Bus release enable
The bus cannot be
0 released to an
external device
The bus can be
1 released to an
external device
ISCR—IRQ Sense Control Register
H'EE014
Interrupt Controller
Bit
7
⎯
Initial value
0
Read/Write R/W
6
5
4
3
2
1
0
⎯ IRQ5SC IRQ4SC IRQ3SC IRQ2SC IRQ1SC IRQ0SC
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W R/W
IRQ5 to IRQ0 sense control
0 Interrupts are requested when IRQ5 to IRQ0 are low
1 Interrupts are requested by falling-edge input at IRQ5 to IRQ0
Rev.4.00 Aug. 20, 2007 Page 544 of 638
REJ09B0395-0400