ST7263 STMICROELECTRONICS [STMicroelectronics], ST7263 Datasheet - Page 7

• Manufacturer Part Number: ST7263
• Description: LOW SPEED USB 8-BIT MCU FAMILY with up to 16K MEMORY, up to 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I2C
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

PIN DESCRIPTION (Cont’d)
RESET (see Note 1): Bidirectional. This active low
signal forces the initialization of the MCU. This
event is the top priority non maskable interrupt.
This pin is switched low when the Watchdog has
triggered or V
ternal peripherals.
OSCIN/OSCOUT: Input/Output Oscillator pin.
These pins connect a parallel-resonant crystal, or
an external source to the on-chip oscillator.
V
must be held low during normal operating modes.
V
Ground voltages.
V
Ground for analog peripherals.
Table 2. Device Pin Description
10 11 PB6/AIN6/IT7
11 12 V
12 13 PB5/AIN5/IT6
13 14 PB4/AIN4/IT5
14 15 PB3/AIN3
15 16 PB2/AIN2
16 17 PB1/AIN1
17 18 PB0/AIN0
18 19 PA7/OCMP2/IT4
19 20 PA6/OCMP1/IT3
Pin n°
--
1
2
3
4
5
6
7
8
9 10 PB7/AIN7/IT8
PP
DD
DDA
/TEST: EPROM programming input. This pin
/V
1
2
3
4
5
6
7
8
9
/V
SS
SSA
V
OSCOUT
OSCIN
V
PC2/USBOE
PC1/TDO
PC0/RDI
RESET
NC
DD
SS
PP
(see Note 2): Main power supply and
/TEST
(see Note 2): Power Supply and
Pin Name
DD
is low. It can be used to reset ex-
I/O
I/O
I/O
I/O
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O
I/O
O
S
S
--
S
I
T
T
T
T
T
T
T
T
Level
C
C
C
C
C
10mA X
10mA X
10mA X
10mA X
10mA X
10mA X
10mA X
10mA X
T
T
T
T
T
Port / Control
X
X
X
X
X
X
Input
X
X
X
X
X
X
Alternate Functions: Several pins of the I/O ports
assume software programmable alternate func-
tions as shown in the pin description.
Note 1: Adding two 100nF decoupling capacitors
on Reset pin (respectively connected to
V
netic susceptibility performances.
Note 2: To enhance reliability of operation, it is
recommended to connect
on the application board. The same recommenda-
tions apply to
X
X
X
X
X
X
X
X
SS
) will significantly improve product electromag-
Output
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Power supply voltage (4V - 5.5V)
Oscillator output
Oscillator input
Digital ground
Port C2
Port C1
Port C0
Reset
Not connected
Port B7
Port B6
Supply for EPROM and test input
Port B5
Port B4
Port B3
Port B2
Port B1
Port B0
Port A7
Port A6
(after reset)
Function
V
Main
SSA
and
V
USB Output Enable
SCI transmit data output
SCI Receive Data Input
ADC analog input 7
ADC analog input 6
ADC analog input 5
ADC analog input 4
ADC analog input 3
ADC analog input 2
ADC analog input 1
ADC Analog Input 0
Timer Output Compare 2
Timer Output Compare 1
SS
.
V
Alternate Function
DDA
and
V
DD
ST7263
together
V
DD
7/109
*)
and
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