參數(shù)資料
型號(hào): MC68HC05P8EVS
廠商: Motorola, Inc.
英文描述: HCMOS MICROCONTROLLER UNIT
中文描述: HCMOS微控制器
文件頁(yè)數(shù): 43/82頁(yè)
文件大小: 327K
代理商: MC68HC05P8EVS
MC68HC705J2
Rev. 2
TIMER
MOTOROLA
7-1
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SECTION 7
TIMER
This section describes the operation of the timer and the COP timer.
Figure 7-1
shows the organization of the timer system.
Figure 7-1. Timer
INTERNAL PROCESSOR
CLOCK
(XTAL
÷
2)
FIXED
DIVIDE BY
4
÷
2
÷
2
÷
2
÷
2
÷
2
÷
2
÷
2
÷
2
M
L
TCR $0009
TIMER COUNTER REGISTER
÷
2
÷
2
÷
2
÷
2
÷
2
TCSR $0008
T
T
R
0
0
R
R
LEAST SIGNIFICANT EIGHT BITS OF 15-STAGE RIPPLE COUNTER
MOST SIGNIFICANT SEVEN BITS OF 15-STAGE RIPPLE COUNTER
÷
2
÷
2
RTI RATE SELECT
÷
2
÷
2
÷
2
CLEAR COP TIMER
S
Q
R
COP TIMER RESET
TIMER CONTROL AND STATUS REGISTER
POWER-ON
RESET (POR)
INTERRUPT CIRCUIT
R
INTERRUPT REQUEST
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