MC68181 Datasheet, PDF (6/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

MC68181
Power Input and Monitoring
Freescale Semiconductor, Inc.
MC68181
V_DD
V_SS
2
4
LOBAT
Power:
Input power
Ground
Low Battery
Detect
Current
Symbol MSB
Current
Symbol LSB
EXTS1
EXTS0
CLKOUT
SYMCLK
EXTAL
XTAL
OSCPD
RESET
38.4 kHz
Symbol Clock
External input
External output
Oscillator Power
Down
Serial
Peripheral
Interface
(SPI)
SCK
SS
MOSI
MISO
READY
Hardware
Reset
Receiver ⁸ _S0–S7
Control Port
Figure 1-1 Signals Identified by Functional Group
AA122
POWER INPUT AND MONITORING
Power Name
V_DD
V_SS
LOBAT
Table 1-2 Power Input, Monitoring, and Control Signals
Description
Power—V_DD is the input power for the IC.
Ground—V_SS is ground connection for the IC.
Low Battery—LOBAT provides an input signal to indicate to the IC when external
battery power is going low. (An external voltage sensing circuit is required)
1-2
MC68181 Technical Data Sheet
MOTOROLA
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