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參數(shù)資料
| 型號(hào)： | HD404639R |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī)) |
| 中文描述： | 4位單片機(jī)（4位單片微計(jì)算機(jī)） |
| 文件頁(yè)數(shù)： | 65/133頁(yè) |
| 文件大小： | 803K |
| 代理商： | HD404639R |
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HD404639R Series
65
Timer write register B (TWBL: $00A, TWBU: $00B): Write-only register consisting of the lower digit
(TWBL) and the upper digit (TWBU) as shown in figures 46 and 47. The lower digit is reset to $0 by
MCU reset, but the upper digit value is invalid.
Timer B is initialized by writing to timer write register B. In this case, the lower digit (TWBL) must be
written to first, but writing only to the lower digit does not change the timer B value. Timer B is
initialized to the value in timer write register B at the same time the upper digit (TWBU) is written to.
When timer write register B is written to again and if the lower digit value needs no change, writing
only to the upper digit initializes timer B.
Bit
Initial value
Read/Write
Bit name
3
0
W
TWBL3
2
0
W
TWBL2
0
0
W
TWBL0
1
0
W
TWBL1
Timer write register B (lower digit) (TWBL: $00A)
Figure 46 Timer Write Register B Lower Digit (TWBL)
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 47 Timer Write Register B Upper Digit (TWBU)
Timer read register B (TRBL: $00A, TRBU: $00B): Read-only register consisting of the lower digit
(TRBL) and the upper digit (TRBU) that holds the count of the timer B upper digit (figures 48 and 49).
The upper digit (TRBU) must be read first. At this time, the count of the timer B upper digit is
obtained, and the count of the timer B lower digit is latched to the lower digit (TRBL). After this, by
reading TRBL, the count of timer B when TRBU is read can be obtained.
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 48 Timer Read Register B Lower Digit (TRBL)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD407A4639R | 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī)) |
| HD404652 | 4-Bit Single-Chip Microcomputer |
| HD404652H | RES T 0.2E 5W 1% |
| HD404652S | 4-Bit Single-Chip Microcomputer |
| HD404654 | RESISTOR, 0.10 OHM 5W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD404639RF | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD404639RSERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| HD404652 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer |
| HD404652H | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer |
| HD404652S | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer |
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