ST7263Bxx
Pin description
Table 3. Device pin description (QFN40, LQFP48, SO34 and SDIP32) (continued)
Pin n°
Pin name
Level
Port /control
Input
Output
Main
function
(after
reset)
Alternate function
31 33 5 4 USBVCC(2)
O
USB power supply 2)
32 34 6 5 VDDA
S
Analog supply voltage
1. Port D functions are not available on the 8 Kbyte version of the QFN40 package (ST7263BK2) and should not be
connected.
2. The drive from USBVcc is sufficient to only drive an external pull-up in addition to the internal transceiver.
Table 4.
Pin n°
Device pin description (SO24)
Level
Pin name
Port /control
Input
Output
Main
function
(after
reset)
Alternate function
1 VDD
2 OSCOUT
3 OSCIN
4 VSS
5 PC1/TDO
6 PC0/RDI
7 RESET
8 PB6/IT7
9 VPP/TEST
10 PB3
11 PB2
12 PB1/USBOE
13 PB0
14 PA7/OCMP2/IT4
15 PA5/ICAP2/IT2
16 PA4/ICAP1/IT1
17 PA3/EXTCLK
18
PA2/SCL/
ICCCLK
19 PA1/SDA/ICCDATA
S
Power supply voltage (4- 5.5 V)
O
Oscillator output
I
Oscillator input
S
Digital ground
I/O
CT
X
X Port C1
SCI Transmit Data
output
I/O CT
X
X Port C0 SCI Receive Data input
I/O
X
X
Reset
I/O CT 10mA X
XX
X Port B6
S
Programming supply
I/O CT 10mA X
X
X Port B3
I/O CT 10mA X
X
X Port B2
I/O CT 10mA X
X
X Port B1 USB output Enable
I/O CT 10mA X
X
X Port B0
I/O
CT
XX
X Port A7
Timer output Compare
2
I/O
CT
XX
X Port A5 Timer input Capture 2
I/O
CT
XX
X Port A4 Timer input Capture 1
I/O
CT
X
X Port A3 Timer External clock
I/O CT 25mA X
T
Port A2
I²C serial clock,
ICC clock
I/O CT 25mA X
T
Port A1
I²C serial data, ICC
Data
Doc ID 7516 Rev 8
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