參數資料
型號: HD4074459
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計算機)
中文描述: 4位HMCS400系列微機(4位單片微計算機)
文件頁數: 65/120頁
文件大?。?/td> 692K
代理商: HD4074459
HD404459 Series
65
Bit
Initial value
Read/Write
Bit name
3
Undefined
W
TWBU3
2
Undefined
W
TWBU2
0
Undefined
W
TWBU0
1
Undefined
W
TWBU1
Timer write register B (upper digit) (TWBU: $00B)
Figure 48 Timer Write Register B Upper Digit (TWBU)
Timer read register B (TRBL: $00A, TRBU: $00B): Read-only register consisting of a lower digit
(TRBL) and an upper digit (TRBU) that holds the count of the timer B upper digit.
The upper digit (TRBU) must be read first, which will result in the count of the timer B upper digit to
be obtained and the count of the timer B lower digit to be latched to the lower digit (TRBL). Then by
reading TRBL, the count of timer B can be obtained when TRBU is read.
Bit
Initial value
Read/Write
Bit name
3
Undefined
R
TRBL3
2
Undefined
R
TRBL2
0
Undefined
R
TRBL0
1
Undefined
R
TRBL1
Timer read register B (lower digit) (TRBL: $00A)
Figure 49 Timer Read Register B Lower Digit (TRBL)
Bit
Initial value
Read/Write
Bit name
3
Undefined
R
TRBU3
2
Undefined
R
TRBU2
0
Undefined
R
TRBU0
1
Undefined
R
TRBU1
Timer read register B (upper digit) (TRBU: $00B)
Figure 50 Timer Read Register B Upper Digit (TRBU)
相關PDF資料
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HD404458 4-bit HMCS400-Series microcomputer(4位單片微計算機)
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參數描述
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