– 15 –

CXP85112B/85116B, CXP85220A/85224A/85228A/85232A

Resolution

Linearity error

Zero transition

voltage

Full-scale transition

voltage

Conversion time

Sampling time

Analog input voltage

AN0 to AN3

Ta = 25°C

Vss = 0V

–10

4370

160/fc

12/fc

0

160

4530

4

±1

320

4690

Bits

LSB

mV

mV

µs

µs

V

Item

Symbol

Pin

Condition

Min.

Typ.

Max.

Unit

(5) A/D converter characteristics

Linearity error

Analog input

Fig. 8. Definition of A/D converter terms

ZT

: Value at which the digital conversion value changes

FT

: Value at which the digital conversion value changes

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)

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: