參數(shù)資料
型號(hào)： HD404394
廠商： Hitachi,Ltd.
英文描述： 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
中文描述： 4位HMCS400系列微電腦（4位單片微計(jì)算機(jī)）
文件頁數(shù)： 50/100頁
文件大?。?/td> 610K
代理商： HD404394
HD404344R Series/HD404394 Series
50
Timers
The MCU has two built-in timers, B and C. The functions of each timer are listed in table 19.
Table 19
Timer Functions
Functions
Timer B
Timer C
Clock source
Prescaler S
Available
Available
External event
Available
—
Timer functions
Free-running
Available
Available
Event counter
Available
—
Reload
Available
Available
Watchdog
—
Available
Timer output
PWM
—
Available
Timer B
Timer B is an 8-bit multifunction timer that includes free-running, reload, and event counter features. These
are described as follows.
By setting timer mode register B1 (TMB1: $009), one of seven internal clocks supplied from prescaler
S can be selected, or timer B can be used as an external event counter.
By setting timer mode register B2 (TMB2: $026), timer B can be incremented by each edge detector of
input signals at pin EVNB.
By setting timer write register BL, BU (TWBL, TWBU: $00A, $00B), timer counter B (TCB) can be
written to during reload timer operation.
By setting timer read register BL, BU (TRBL, TRBU: $00A, $00B), the contents of timer counter B can
be read out.
Timer B Operation
Free-running/reload timer operation: The selection of the free-running/reload timer, input clock source,
and prescaler division ratio is done by timer mode register B1 (TMB1: $009).
Timer B is initialized to the data which is written to timer write register B (TWBL: $00A, TWBU:
$00B) by software. The data is then incremented in steps of 1 by using the input clock. If the clock
input is continued after timer B is set to $FF, an overflow occurs. Timer B then begins counting again,
setting the timer to the value in timer write register B (TWBL: $00A, TWBU: $00B) when the reload
timer is selected, or reset to $00 when the free-running timer is selected.
相關(guān)PDF資料
PDF描述
HD4074344S 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
HD4074394S 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
HD40C4341R 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
HD40C4342R 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
HD40C4344R 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404394FP 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit microcomputers
HD404394FT 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit microcomputers
HD404394S 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404418F 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404418H 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
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