71M6403
Electronic Trip Unit
SEPTEMBER 2006
Digital Pins:
NAME
PIN #
21
TYPE
DESCRIPTION
DIO_3,
DIO_2,
20
I/O
Digital input/output pins 0 through 3
DIO_1,
19
DIO_0
18
COM3,
25
COM2,
24
O
LCD Common Outputs: These 4 pins provide the select signals for the LCD display.
Dedicated LCD segment outputs
COM1,
23
COM0
22
SEG0…SEG2,
SEG8…SEG23
SEG24/DIO4…
…….
See
pinout
O
I/O
O
Multi-use pins, configurable as either LCD SEG driver or DIO. (DIO4 = SCK, DIO5 =
SDA when configured as EEPROM interface, STROBE = DIO6, FAULT_PULSE =
DIO7 when configured as pulse outputs)
Multi-use-pin LCD Segment Output/ MUX_SYNC is output for Synchronous serial
interface
See
pinout
SEG41/DIO21
SEG7/MUX_SYNC
37
SEG6/SRDY
SEG5/SFR
SEG4/SDATA
SEG3/SCLK
35
11
10
6
I/O
O
O
O
Multi-use-pin, LCD Segment Outputs/ SRDY input for Synchronous serial interface.
Multi-use-pin, LCD Segment Output/ SFR output for SSI.
Multi-use-pin, LCD Segment Output/ SDATA output for SSI.
Multi-use-pin, LCD Segment Output/ SCLK output for SSI.
Chip reset: This pin is used to reset the chip into a known state. For normal
operation, this pin is set to 1. To reset the chip, this pin is driven to 0. This pin has
an internal 30µA (nominal) current source pull-up but no Schmitt-trigger input
circuitry. The minimum width of the pulse is 5µs. A 0.1µF capacitor to GNDA should
be connected to this pin.
RESETZ
74
I
RX
TX
71
5
I
O
UART input. The voltage applied at this input must be below 3.6V.
UART output.
Optical Receive Input: This pin receives a signal from an external photo-detector
used in an IR serial interface.
OPT_RX
89
I
Optical LED Transmit Output: This pin is designed to directly drive an LED for
transmitting data in an IR serial interface. Can be tristated with OPT_TXDIS to be
multiplexed with other DIO pins.
OPT_TX
3
O
CK
TMUXOUT
8
4
O
O
Clock input (19.6608 MHz)
Digital output test multiplexer. Controlled by DMUX[3:0].
E_RXTX
2
12
13
14
15
29
100
97
I/O
Emulator serial data.
E_TBUS[3]
E_TBUS[2]
E_TBUS[1]
E_TBUS[0]
E_ISYNC/BRKRQ
E_TCLK
O
Emulator trace bus. These pins have internal pull-up resistors.
I/O
O
I
Emulator handshake. This pin has an internal pull-up resistor.
Emulator clock. This pin has an internal pull-up resistor.
Emulator reset. This pin has an internal pull-up resistor.
E_RST
For TERIDIAN internal use. This pin must be connected to GNDD via a 1kΩ
TEST3
93
I
resistor.
Page: 74 of 75
© 2006 TERIDIAN Semiconductor Corporation
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TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
