73S1217F Data Sheet
DS_1217F_002
1 Hardware Description
1.1 Pin Description
Table 1: 73S1217 Pinout Description
Pin Name
Description
X12IN
10
I
Figure 29 MPU/USB clock crystal oscillator input pin. A 12MHz crystal
is required for USB operation. A 1MΩ resistor is required
between pins X12IN and X12OUT.
X12OUT
X32IN
11
8
O
I
Figure 29 MPU/USB clock crystal oscillator output pin.
Figure 30 RTC clock crystal oscillator input pin. A 32768Hz crystal is
required for low-power RTC operation.
X32OUT
DP
7
O
IO
IO
I
Figure 30 RTC clock crystal oscillator output pin.
Figure 45 USB D+ IO pin, requires series 24Ω resistor.
Figure 45 USB D- IO pin, requires series 24Ω resistor.
Figure 37 Keypad row input sense.
26
27
DM
ROW(5:0) 0
21
22
24
33
36
37
1
2
3
4
5
COL(4:0) 0
12
13
14
16
19
O
Figure 38 Keypad column output scan pins.
1
2
3
4
USR(7:0) 0
1
35
34
32
31
30
29
23
20
IO
Figure 33 General-purpose user pins, individually configurable as
inputs or outputs or as external input interrupt ports.
2
3
4
5
6
7
SCL
5
O
Figure 32 I2C (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
IO
Figure 31 I2C (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.
RXD
TXD
17
18
I
Figure 35 Serial UART Receive data pin.
Figure 32 Serial UART Transmit data pin.
O
8
Rev. 1.2
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
