ST7263 STMICROELECTRONICS [STMicroelectronics], ST7263 Datasheet - Page 9

• 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]

1.3 EXTERNAL CONNECTIONS
The following figure shows the recommended ex-
ternal connections for the device.
The V
and EPROM devices and must be tied to ground in
user mode.
The 10 nF and 0.1 µF decoupling capacitors on
the power supply lines are a suggested EMC per-
formance/cost tradeoff.
Figure 4. Recommended External Connections
PP
pin is only used for programming OTP
Optional if Low Voltage
Detector (LVD) is used
EXTERNAL RESET CIRCUIT
V
DD
Or configure unused I/O ports
by software as input with pull-up
10nF
+
V
DD
0.1µF
0.1µF
V
DD
0.1µF
10K
See
Clocks
Section
4.7K
The external reset network is intended to protect
the device against parasitic resets, especially in
noisy environments.
Unused I/Os should be tied high to avoid any un-
necessary power consumption on floating lines.
An alternative solution is to program the unused
ports as inputs with pull-up.
V
V
V
RESET
Unused I/O
OSCOUT
OSCIN
PP
DD
SS
ST7263
9/109