Datasheet
73S1215F Data Sheet DS_1215F_003
8 Rev. 1.4
1 Hardware Description
1.1 Pin Description
Table 1: 73S1215F Pinout Description
Pin Name
Pin (68 Qfn)
Pin (44 Qfn)
Type
Equivalent
Circuit*
Description
X12IN 10 8 I Figure 27 MPU/USB clock crystal oscillator input pin. A 12MHz
crystal is required for USB operation. A 1M resistor
is required between pins X12IN and X12OUT.
X12OUT 11 9 O Figure 27 MPU/USB clock crystal oscillator output pin.
X32IN 8 I Figure 28 RTC clock crystal oscillator input pin. A 32768Hz
crystal is required for low-power RTC operation.
X32OUT 7 O Figure 28 RTC clock crystal oscillator output pin.
CPUCLK 39 O Figure 30 Output signal, square wave at the frequency of the
MPU clock.
DP 26 16 IO Figure 43 USB D+ IO pin, requires series 24 resistor.
DM 27 17 IO Figure 43 USB D- IO pin, requires series 24 resistor.
ROW(5:0)
0
1
2
3
4
5
21
22
24
34
37
38
I
Figure 34
Keypad row input sense.
COL(4:0)
0
1
2
3
4
12
13
14
16
19
O Figure 35
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 31
General-purpose user pins, individually configurable as
inputs or outputs or as external input interrupt ports.
SCL 5 5 O Figure 30 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 29 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.