參數(shù)資料
型號: MC68HC05K3CSDR2
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO20
封裝: SSOP-20
文件頁數(shù): 104/132頁
文件大?。?/td> 1188K
代理商: MC68HC05K3CSDR2
8-Bit Timer
Timer Registers
MC68HC05K3 — Revision 4.0
Technical Data
MOTOROLA
8-Bit Timer
73
8.3 Timer Registers
The 8-bit timer contains two registers:
Timer counter register
Timer status/control register
8.3.1 Timer Counter Register
The timer counter register is a read-only register that contains the
current value of the 8-bit ripple counter at the beginning of the timer
chain. This counter is clocked at fOP divided by 4 and can be used for
various functions including a software input capture. Extended time
periods can be attained using the TOF function to increment a temporary
RAM storage location thereby simulating a 16-bit (or more) counter. The
value of each bit of the TCNTR is shown in Figure 8-2. This register is
cleared by reset.
Address:
$0009
Bit 7
654321
Bit 0
Read:
TCR7
TCR6
TCR5
TCR4
TCR3
TCR2
TCR1
TCR0
Write:
Reset:
00000000
= Unimplemented
Figure 8-2. Timer Counter Register (TCNTR)
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