NS32FX100-15 Datasheet, PDF (62/94 Pages) National Semiconductor (TI) – System Controller

4 0 Device Specifications
4 1 NS32FX100 PIN DESCRIPTIONS
The following is a brief description of all NS32FX100 pins
Some NS32FX100 pins have flexible allocation These pins
can be individually configured as general purpose pins even
when the module they belong to is enabled The Ports mod-
ule controls pin allocation
Unless otherwise specified all digital inputs and outputs are
synchronous with the CTTL pin
The following is a brief description of all NS32FX100 pins
4 1 1 Supplies
Signal
GNDA1-2
GNDD1-9
VCCA1-2
VCCD1-9
Pin Numbers
77 82
11 25 38
51 75 90
102 116 131
76 83
5
17 32
50 66 84
96 109 125
Analog ground
Digital ground
Description
Analog Power 5V supply for analog circuits
Digital Power 5V supply for digital circuits
4 1 2 Input Signals
Signal
CTTL
DMRQ3
FOSCI
Pin Numbers
33
58
36
HBE
117
HLDA
114
INT0 – 3 40 41 42
43
MWSI
57
PFAIL
64
PTMP
81
RST
61
SBG
80
SDIN
19
SOSCI
62
SVI
78
URXD
56
UTEN
55
Description
CPU Clock CPU clock that is used for clocking the NS32FX100
DMA Request Input for DMA channel 3 request or general purpose input pin
High-Speed Oscillator (31 9488 MHz – 49 1520 MHz) Asynchronous When an external
oscillator is used FOSCO should be left unconnected or loaded with no more than 5 pF of stray
capacitance
High Byte Enable Status signal used to enable data transfers on the most significant byte of
the data bus
Hold Acknowledge Issued by the CPU to indicate it has released the bus in response to a
HOLD request
Interrupt In Asynchronous External maskable prioritized interrupt requests
MICROWIRE Serial In Serial data for communication via the MICROWIRE protocol or general
purpose input pin
Power Fail Indication An asynchronous signal which forces the NS32FX100 into freeze
mode
Temperature Sense An analog voltage proportional to the printer temperature
Reset In Asynchronous reset input from the CPU
Scanner Background Analog current from the Automatic Background Control circuit (ABC)
Sigma-Delta Data In Asynchronous input from the SDC analog receiver
Low-Speed Oscillator (32 768 kHz or 455 kHz) Asynchronous When an external oscillator is
used SOSCO should be left unconnected or loaded with no more than 5 pF of stray
capacitance
Scanner Video In Analog current from the scanner sample and hold circuit
UART Receive Asynchronous input or general purpose input pin
UART Transmit Enable Input Asynchronous or general purpose input pin
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