ST7232A View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST7232A Datasheet PDF : 157 Pages
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ST7232A
PIN DESCRIPTION (Cont’d)
For external pin connection guidelines, refer to See “ELECTRICAL CHARACTERISTICS” on page 113.
Legend / Abbreviations for Table 1:
Type:
I = input, O = output, S = supply
Input level:
A = Dedicated analog input
In/Output level: C = CMOS 0.3VDD/0.7VDD
CT= CMOS 0.3VDD/0.7VDD with input trigger
Output level: HS = 20mA high sink (on N-buffer only)
Port and control configuration:
– Input:
float = floating, wpu = weak pull-up, int = interrupt 1), ana = analog ports
– Output:
OD = open drain 2), PP = push-pull
Refer to “I/O PORTS” on page 42 for more details on the software configuration of the I/O ports.
The RESET configuration of each pin is shown in bold. This configuration is valid as long as the device is
in reset state.
Table 1. Device Pin Description
Pin n°
Pin Name
Level
Port
Input
Output
Main
function
(after
reset)
Alternate Function
6 1 30 1 PB4 (HS)
7 2 31 2 PD0/AIN0
8 3 32 3 PD1/AIN1
94
PD2/AIN2
10 5
PD3/AIN3
11 6
PD4/AIN4
12 7
PD5/AIN5
13 8 1 4 VAREF
14 9 2 5 VSSA
15 10 3 6 PF0/MCO/AIN8
16 11 4 7 PF1 (HS)/BEEP
17 12
PF2 (HS)
18 13 5
8
PF4/OCMP1_A/
AIN10
I/O CT HS X ei3
I/O CT
XX
I/O CT
XX
I/O CT
XX
I/O CT
XX
I/O CT
XX
I/O CT
XX
S
X X Port B4
X X X Port D0 ADC Analog Input 0
X X X Port D1 ADC Analog Input 1
X X X Port D2 ADC Analog Input 2
X X X Port D3 ADC Analog Input 3
X X X Port D4 ADC Analog Input 4
X X X Port D5 ADC Analog Input 5
Analog Reference Voltage for ADC
S
Analog Ground Voltage
I/O CT
X
ei1
X
X
X
Port F0
Main clock
out (fCPU)
ADC Analog
Input 8
I/O CT HS X ei1
X X Port F1 Beep signal output
I/O CT HS X
ei1
X X Port F2
I/O CT
XX
X
X
X
Port F4
Timer A Out-
put Com-
pare 1
ADC Analog
Input 10
19 14 6 9 PF6 (HS)/ICAP1_A I/O CT HS X X
20 15
7
10
PF7 (HS)/
EXTCLK_A
I/O CT HS X X
X X Port F6 Timer A Input Capture 1
X
X
Port F7
Timer A External Clock
Source
21
VDD_0
22
VSS_0
23 16
8
11
PC0/OCMP2_B/
AIN12
S
S
I/O CT
XX
Digital Main Supply Voltage
Digital Ground Voltage
X
X
X
Port C0
Timer B Out-
put Com-
pare 2
ADC Analog
Input 12
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