參數(shù)資料
型號: MC68HC05G3
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 45/128頁
文件大?。?/td> 290K
代理商: MC68HC05G3
Page 13
Section 1: INTRODUCTION
MOTOROLA
MC68HC05G3 (705G4) Specification Rev. 1.1
1.4.1.7
TIME BASE CONTROL REGISTER 1 (TBCR1)
READ:
anytime
WRITE:
anytime (Only one-time write is allowed on bit 7 after reset.)
TBCLK
Time Base Clock
The TBCLK bit selects time base clock source. This bit is cleared at reset. After
reset, write to this bit is allowed only once.
0 - XOSC clock is selected
1 - OSC clock divided by 128 is selected
BITS 6-4
Reserved
These bits are not used and always read as zero.
T3R1/0
Prescale Rate or Clock select bits for PWM
These 2 bits select the clock for the PWM. (See 8.5.5 TIMER BASE CONTROL
REGISTER 1 (TBCR1).)
T2R1/0
Preschool Rate Select bits for Timer 2
These 2 bits select the timer 2 clock rate. (See 8.5.5 TIMER BASE CONTROL
REGISTER 1 (TBCR1).)
1.4.1.8
TIME BASE CONTROL REGISTER 2 (TBCR2)
READ:
anytime (Bits 3 and 0 are write-only bits and always read as zero.)
WRITE:
anytime (Bit 7 is a read-only bit and write has no effect; bit 1 is a one-time
write bit.)
TBCLK
$0010
0
T3R1
T3R0
T2R1
T2R0
TBCR1
B7
B6
B5
B4
B3
B2
B1
B0
00000000
RESET:
TBIF
$0011
TBIE
TBR1
TBR0 RTBIF
0
COPE COPC
TBCR2
B7
B6
B5
B4
B3
B2
B1
B0
00110000
RESET:
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