参数资料
型号: MC68HC05SB7
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: MO-150, SSOP-28
文件页数: 27/170页
文件大小: 2161K
代理商: MC68HC05SB7
GENERAL RELEASE SPECIFICATION
August 27, 1998
MOTOROLA
ANALOG SUBSYSTEM
MC68HC05SB7
15-24
REV 2.1
Figure 15-9. A/D Conversion - Manual/Auto Discharge Control (Mode 1)
Point
Action
Software/Hardware Action
Dependent Variable(s)
0
Begin initial Discharge and select
Mode 1 by clearing CHG and ATD2;
and setting ATD1 in the ACR.
Software write.
Software.
1VCAP falls to VSS.
Wait out minimum tDIS time.
VMAX, IDIS, CX.
2
Stop Discharge and begin Charge
by setting CHG control bit in ACR.
Software write.
Software.
3
VCAP rises to VX and comparator
output trips, setting CPF which
clears CHG control bit in the ACR.
Wait out tCHG time.
CPF clears CHG control bit.
VX, ICHG, CX.
tDIS
(MIN)
tCHG X ICHG
CX
tCHG
tDIS
VX =
VMAX
CHG
COMP
0
TOF
OCF
ICF
(MIN)
VCAP
tDIS
VX
1
2
3
1
2
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