Freescale Semiconductor, Inc.
Pinout and Signal Descriptions
Table 3-1. 68HC(9)12D60 Power and Ground Connection Summary
Pin Number
Mnemonic
Description
80-pin
QFP
112-pin
QFP
V
9, 49
10, 50
30, 75
29, 74
61
12, 65
14, 66
42, 107
40, 106
85
DD
Internal power and ground.
V
SS
V
DDX
External power and ground, supply to pin drivers.
V
V
V
V
SSX
DDA
SSA
RH1
Operating voltage and ground for the analog-to-digital
converter, allows the supply voltage to the A/D to be
bypassed independently.
62
88
—
86
Reference voltages for the analog-to-digital converter 1
Reference voltages for the analog-to-digital converter 0.
V
V
—
87
RL1
51
67
RH0
V
52
68
RL0
V
Provides operating voltage and ground for the Phased-Locked
Loop. This allows the supply voltage to the PLL to be
bypassed independently.
31
43
DDPLL
V
33
45
SSPLL
Programming voltage for the Flash EEPROM and required
supply for normal operation. (68HC912D60 only – on the
68HC12D60 this pin is not connected and can be tied to 5V
or 12V without effect)
V
71
97
FP
3.5 Signal Descriptions
3.5.1 Crystal Driver and External Clock Input (XTAL, EXTAL)
These pins provide the interface for either a crystal or a CMOS
compatible clock to control the internal clock generator circuitry. Out of
reset the frequency applied to EXTAL is twice the desired E–clock rate.
All the device clocks are derived from the EXTAL input frequency.
NOTE: CRYSTAL CIRCUIT IS CHANGED FROM STANDARD.
Advance Information
44
68HC(9)12D60 — Rev 4.0
MOTOROLA
Pinout and Signal Descriptions
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