Teridian 73S1209F, Datasheet

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73S1209F Data Sheet DS_1209F_004
1 Hardware Description
1.1 Pin Description
Table 1: 73S1209F Pinout Description
Pin Name
Pin (68 QFN) Pin (44 QFN) Type Equivalent Circuit*
Description
X12IN 10 8 I
Figure 26 MPU clock crystal oscillator input pin. A 1M Ω resistor is
required between pins X12IN and X12OUT.
X12OUT 11 9 O Figure 26 MPU clock crystal oscillator output pin.
ROW (5:0)
0
1
2
3
4
5
21
22
24
34
37
38
I
Figure 32
Keypad row input sense.
COL(4:0)
0
1
2
3
4 12
13
14
16
19 O Figure 33 Keypad column output scan pins.
USR(8:0)
0
1
2
3
4
5
6
7
8
36
35
33
31
30
29
23
20
32
24
23
22
21
20
19
14
13
IO Figure 29 General-purpose user pins, individually configurable as
inputs or outputs or as external input interrupt ports.
SCL 5 5 O Figure 28 I
2
C (master mode) compatible Clock signal. Note: the
pin is configured as an open drain output. When the
I2C interface is being used, an external pull up resistor
is required. A value of 3K is recommended.
SDA 6 6 IO Figure 27 I
2
C (master mode) compatible data I/O. Note: this pin is
bi-directional. When the pin is configured as output, it is
an open drain output. When the I2C interface is being
used, an external pull up resistor is required. A value of
3K is recommended.
LED(1:0)
0
1
1
3 3
4 IO
Figure 34
Special output drivers, programmable pull-down current
to drive LEDs. May also be used as inputs.
RXD 17 11 I Figure 31 Serial UART Receive data pin.
TXD 18 12 O Figure 28 Serial UART Transmit data pin.
INT3 51 I Figure 31 General purpose interrupt input.
8 Rev. 1.2