73S1215F Data Sheet
DS_1215F_003
1 Hardware Description
1.1 Pin Description
Table 1: 73S1215F Pinout Description
Pin Name
Description
X12IN
10
8
9
I
Figure 27 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 27 MPU/USB clock crystal oscillator output pin.
Figure 28 RTC clock crystal oscillator input pin. A 32768Hz
crystal is required for low-power RTC operation.
X32OUT
CPUCLK
7
O
O
Figure 28 RTC clock crystal oscillator output pin.
39
Figure 30 Output signal, square wave at the frequency of the
MPU clock.
DP
26
27
16
17
IO
IO
I
Figure 43 USB D+ IO pin, requires series 24Ω resistor.
Figure 43 USB D- IO pin, requires series 24Ω resistor.
Figure 34 Keypad row input sense.
DM
ROW(5:0)
0
1
2
3
4
5
21
22
24
34
37
38
COL(4:0)
Keypad column output scan pins.
O
Figure 35
Figure 31
0
1
2
3
4
12
13
14
16
19
USR(8:0)
General-purpose user pins, individually configurable as
inputs or outputs or as external input interrupt ports.
IO
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
SCL
5
5
O
Figure 30 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
6
IO
Figure 29 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.
8
Rev. 1.4
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
