参数资料
型号: MC68HC05JB4P
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PDIP28
封装: PLASTIC, DIP-28
文件页数: 5/134页
文件大小: 2440K
代理商: MC68HC05JB4P
GENERAL RELEASE SPECIFICATION
February 24, 1999
ANALOG TO DIGITAL CONVERTER
REV
Using a port pin as both an analog and digital input simultaneously is prohib-
ited. When the ADC is enabled (ADON=1) and one of channels is selected, the
corresponding port pin will appear as a logic zero when read from the Port Data
Register. Note that the pull-up on a port-B pin will be disabled automatically
when that port pin is selected as the ADC input and the ADON bit is set to logic
“1”.
11.3
ADC DATA REGISTER (ADDR)
The ADDR stores the result of a valid ADC conversion when the COCO bits is set
in ADSCR.
Figure 11-3. A/D Data Register
Table 11-1. A/D Channel Assignments
CH3
CH2
CH1
CH0
Channel
Signal
0000
0
AD0 (PC0)
0001
1
AD1 (PC1)
0010
2
AD2 (PC2)
0011
3
AD3 (PC3)
0100
4
AD4 (PB3)
0101
5
AD5 (PB4)
0110
6
Not Implemented
0111
7
Not Implemented
1000
8
Not Implemented
1001
9
Not Implemented
1010
10
Not Implemented
1011
11
Not Implemented
1100
12
VRH (PC4)
1101
13
VRL (PC5)
1110
14
(VRH+VRL)/4
1111
15
(VRH+VRL)/2
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
ADDR
R
ADDR7
ADDR6
ADDR5
ADDR4
ADDR3
ADDR2
ADDR1
ADDR0
$000F
W
reset:
00000000
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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