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CXP-85232A View Datasheet(PDF) - Sony Semiconductor

Part NameDescriptionManufacturer
CXP-85232A CMOS 8-bit Single-chip Microcomputer Sony
Sony Semiconductor Sony
CXP-85232A Datasheet PDF : 20 Pages
First Prev 11 12 13 14 15 16 17 18 19 20
CXP85112B/85116B, CXP85220A/85224A/85228A/85232A
(5) A/D converter characteristics
(Ta = –20 to +75°C, VDD = 4.5 to 5.5V, Vss = 0V reference)
Item
Symbol
Pin
Condition
Resolution
Linearity error
Zero transition
voltage
Full-scale transition
voltage
VZT1
VFT2
Ta = 25°C
VDD = 5.0V
Vss = 0V
Conversion time
Sampling time
tCONV
tSAMP
Analog input voltage VIAN AN0 to AN3
Min.
Typ.
–10
4370
160/fc
12/fc
0
160
4530
Max. Unit
4
Bits
±1 LSB
320 mV
4690 mV
µs
µs
VDD
V
FH
EH
1H
0H
VZT
Linearity error
1 VZT: Value at which the digital conversion value changes
from 0H to 1H and vice versa.
2 VFT: Value at which the digital conversion value changes
from EH to FH and vice versa.
VFT
Analog input
Fig. 8. Definition of A/D converter terms
Note) The 4-bit conversion specifies values based on the upper 5 bits of the A/D data register (ADD: Address
00F5H), compensated into 4-bit data. A program example is shown below:
(A/D converter program example)
MOV
A, ADD ; ACC conversion data
LSR
A
; Shift to the right (4 times)
LSR
A
;
LSR
A
;
LSR
A
;
ADC
A, #00H ; Addition with carry (data increment if AD3 = 1)
CMP
A, #10H ;
BNE
ADC_SKIP ;
MOV
A, #0FH ;
ADC_SKIP:
– 15 –
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