CXP85112 Sony Corporation, CXP85112 Datasheet - Page 15

• Manufacturer Part Number: CXP85112
• Description: CMOS 8-bit Single-chip Microcomputer
• Manufacturer: Sony Corporation

(5) A/D converter characteristics
Note) The 4-bit conversion specifies values based on the upper 5 bits of the A/D data register (ADD: Address
(A/D converter program example)
ADC_SKIP:
Resolution
Linearity error
Zero transition
voltage
Full-scale transition
voltage
Conversion time
Sampling time
Analog input voltage
00F5
E
F
Item
1
0
H
H
H
H
H
), compensated into 4-bit data. A program example is shown below:
V
ZT
MOV
LSR
LSR
LSR
LSR
ADC
CMP
BNE
MOV
Symbol
V
V
t
t
V
CONV
SAMP
Analog input
ZT 1
FT 2
IAN
A, ADD
A
A
A
A
A, #00H
A, #10H
ADC_SKIP ;
A, #0FH
Linearity error
AN0 to AN3
Fig. 8. Definition of A/D converter terms
Pin
; ACC
; Shift to the right (4 times)
;
;
;
; Addition with carry (data increment if AD3 = 1)
;
;
V
FT
Ta = 25°C
V
Vss = 0V
DD
conversion data
Condition
(Ta = –20 to +75°C, V
1
2
= 5.0V
– 15 –
V
V
ZT
FT
: Value at which the digital conversion value changes
: Value at which the digital conversion value changes
from 0
from E
CXP85112B/85116B, CXP85220A/85224A/85228A/85232A
H
H
to 1
to F
160/fc
H
4370
12/fc
H
Min.
–10
and vice versa.
0
and vice versa.
DD
= 4.5 to 5.5V, Vss = 0V reference)
4530
Typ.
160
4690
Max.
320
V
±1
4
DD
LSB
Unit
Bits
mV
mV
µs
µs
V