mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 42

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Pinout and Signal Descriptions
3.3.8 V
3.4 Signal Descriptions
3.4.1 Crystal Driver and External Clock Input (XTAL, EXTAL)
Technical Data
42
Mnemonic
V
V
V
V
V
V
V
V
V
V
V
V
DDPLL
SSPLL
V
V
STBY
DDX
DDA
SSX
SSA
RH1
RH0
RL1
RL0
DD
SS
FP
STBY
NOTE:
112-pin QFP
Pin Number
42, 107
40, 106
12, 65
14, 66
85
88
86
87
67
68
43
45
97
41
Table 3-1. Power and Ground Connection Summary
Stand-by voltage supply to static RAM. Used to maintain the contents of
RAM with minimal power when the rest of the chip is powered down.
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.
CRYSTAL CIRCUIT IS CHANGED FROM STANDARD.
Freescale Semiconductor, Inc.
Internal power and ground.
External power and ground, supply to pin drivers.
Operating voltage and ground for the analog-to-digital converter, allows the
Reference voltages for the analog-to-digital converter 1
Reference voltages for the analog-to-digital converter 0.
Provides operating voltage and ground for the Phase-Locked Loop. This allows
Program/erase voltage for the Flash EEPROM and required supply for normal
Stand-by voltage supply to maintain the contents of RAM with minimal power
For More Information On This Product,
supply voltage to the A/D to be bypassed independently.
the supply voltage to the PLL to be bypassed independently.
operation.
when the rest of the chip is powered down.
Pinout and Signal Descriptions
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Description
MC68HC912DG128 — Rev 3.0
MOTOROLA