參數資料
型號: MC68HC05SB7
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝: MO-150, SSOP-28
文件頁數: 25/170頁
文件大?。?/td> 2161K
代理商: MC68HC05SB7
GENERAL RELEASE SPECIFICATION
August 27, 1998
MOTOROLA
ANALOG SUBSYSTEM
MC68HC05SB7
15-22
REV 2.1
The general architecture of the MC68HC05SB7 and mode selection bits in the
ACR allow four methods based on simple single-slope A/D conversion. Each of
these methods is shown in the following gures:
Manual start and stop (Mode 0) Figure 15-8.
Manual start and automatic discharge (Mode 1) Figure 15-9.
Automatic start and stop from TOF to ICF (Mode 2) Figure 15-10.
Automatic start and stop from OCF to ICF (Mode 3) Figure 15-11.
The description of the signals and parameters used in these gures are given in
Table 15-5. Sample Conversion Timing
Bits
Counts
VMAX
(VDC)
A/D Method
Clock Source
fOSC
(MHz)
tCHG
(
s)
C
(
F)
8
256
3.5
Software Loop (10 cycles)
Mode 0 (manual)
Ext Pin Oscillator
2.0
2560
0.073
8
256
3.5
Programmable Timer,
Mode 1 (TOF to ICF)
VCO
0.5
4096
0.117
Ext Pin Oscillator
1.0
2048
0.059
2.0
1024
0.029
4.0
512
0.015
10
1024
3.5
Programmable Timer,
Mode 1 (TOF to ICF)
VCO
0.5
16384
0.468
Ext Pin Oscillator
1.0
8192
0.234
2.0
4096
0.117
4.0
2048
0.059
12
4096
3.5
Programmable Timer,
Mode 1 (TOF to ICF)
VCO
0.5
65536
1.872
Ext Pin Oscillator
1.0
32768
0.936
2.0
16384
0.468
4.0
8192
0.234
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