Datasheet

Analog-to-Digital Converter (S08ATDV3)
MC9S08GT16A/GT8A Data Sheet, Rev. 1
224 Freescale Semiconductor
Figure 14-2. ATD Block Diagram
14.2 External Signal Description
The ATD supports eight input channels and requires four supply/reference/ground pins. These pins are
listed in Table 14-1.
ADDRESS
CONTROL
R/W DATA
CTL
DATA
JUSTIFICATION
INTERRUPT
CONVERSION REGISTER
SAR_REG
<9:0>
CONVERSION CLOCK
PRESCALER
BUSCLK
CLOCK
PRESCALER
CTL
STATUS
STATE
MACHINE
CONVERSION MODE
CONTROL BLOCK
CONTROL AND
REGISTERS
CTL
RESULT REGISTERS
INPUT
MUX
= INTERNAL PINS
= CHIP PADS
V
DDAD
V
SS
V
SSAD
V
DD
ADP0
ADP1
AD P 2
ADP3
ADP4
ADP5
AD P 6
ADP7
V
REFL
V
REFH
ANALOG
DIGITAL
POWERDOWN
SUCCESSIVE APPROXIMATION REGISTER
ANALOG-TO-DIGITAL CONVERTER (ATD) BLOCK
STATUS