Z51F3220FNX Datasheet, PDF (182/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
11.11.3 Block Diagram
ADSEL[3:0]
(Select one input pin
of the assigned pins)
AN0
AN1
AN2
Input Pins
AN14
AN15
M
U
+
X
-
Reference
Voltage
Start
ADCLK
Clock
Selector
TRIG[2:0]
3
M
U
X
ADST
T1 A match signal
T4 overflow event signal
T4 A match event signal
T4 B match event signal
T4 C match event signal
Clear
AFLAG
Comparator _Control
Logic
ADCIFR
Clear
INT_ACK
To interrupt
block
ADCDRH (R), ADCDRL (R)
REFSEL
MUX _AVSS
VDD AVREF
Figure 11.52 12-bit ADC Block Diagram
Analog
Input
0~1000pF
AN0~
AN15
Figure 11.53 A/D Analog Input Pin with
Capacitor
Analog
Power
Input
22uF
AVREF
Figure 11.54 A/D Power (AVREF) Pin with
Capacitor
PS029902-0212
PRELIMINARY
179