HD6412350 Hitachi, HD6412350 Datasheet - Page 146
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HD6412350
Manufacturer Part Number
HD6412350
Description
(HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
Manufacturer
Hitachi
Datasheet
1.HD6412350.pdf
(989 pages)
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6.2.3
WCRH and WCRL are 8-bit readable/writable registers that select the number of program wait
states for each area.
In normal mode, only part of area is 0 is enabled, and bits W01 and W00 select the number of
program wait states for the external space . The settings of bits W71, W70 to W11, and W10 have
no effect on operation.
Program waits are not inserted in the case of on-chip memory or internal I/O registers.
WCRH and WCRL are initialized to H'FF by a power-on reset and in hardware standby mode.
They are not initialized by a manual reset or in software standby mode.
(1) WCRH
Bits 7 and 6—Area 7 Wait Control 1 and 0 (W71, W70): These bits select the number of
program wait states when area 7 in external space is accessed while the AST7 bit in ASTCR is set
to 1.
Bit 7
W71
0
1
126
Bit
Initial value
R/W
Wait Control Registers H and L (WCRH, WCRL)
Bit 6
W70
0
1
0
1
:
:
:
W71
R/W
7
1
Description
Program wait not inserted when external space area 7 is accessed
1 program wait state inserted when external space area 7 is accessed
2 program wait states inserted when external space area 7 is accessed
3 program wait states inserted when external space area 7 is accessed
W70
R/W
6
1
W61
R/W
5
1
W60
R/W
4
1
W51
R/W
3
1
W50
R/W
2
1
W41
R/W
1
1
(Initial value)
W40
R/W
0
1
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