UPSD3254 STMICROELECTRONICS [STMicroelectronics], UPSD3254 Datasheet - Page 72

• Manufacturer Part Number: UPSD3254
• Description: Flash Programmable System Devices with 8032 Microcontroller Core
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Table 46. ADC SFR Memory Map
Table 47. Description of the ACON Bits
Table 48. ADC Clock Input
72/175
Addr
SFR
95
96
97
7 to 6
3 to 2
Bit
5
4
1
0
ACON
MCU Clock Frequency
Name
ASCL
ADAT
Reg
ADS1, ADS0 Analog channel select
40MHz
36MHz
24MHz
12MHz
Symbol
ADEN
ADST
ADSF
ADAT7
0, 0
0, 1
1, 0
1, 1
—
—
7
ADC Enable Bit: 0 : ADC shut off and consumes no operating current
Reserved
Reserved
ADC Start Bit:
ADC Status Bit:
ADAT6
6
ADAT5
ADEN
5
Prescaler Register Value
Bit Register Name
1 : enable ADC
Channel0 (ACH0)
Channel1 (ACH1)
Channel2 (ACH2)
Channel3 (ACH3)
0 : force to zero
1 : start an ADC; after one cycle, bit is cleared to '0'
0 : A/D conversion is in process
1 : A/D conversion is completed, not in process
ADAT4
4
2
2
1
0
ADAT3
ADS1
3
Function
ADAT2
ADS0
2
ADAT1
ADST
1
ADAT0
ADSF
0
ADC Clock
6.7MHz
6MHz
6MHz
6MHz
Reset
Value
00
00
00
Prescaler for
ADC Control
Comments
ADC clock
ADC Data
Register
Register
8-bit