ST7260E1 STMicroelectronics, ST7260E1 Datasheet - Page 10

• Manufacturer Part Number: ST7260E1
• Description: LOW SPEED USB 8-BIT MCU FAMILY WITH UP TO 8K FLASH/ROM AND SERIAL COMMUNICATION INTERFACE (SCI)
• Manufacturer: STMicroelectronics

Specifications of ST7260E1

• 4 Or 8 Kbytes Program Memory: high density Flash (HDFlash), or FastROM with readout and write protection

Pin description
Note:
10/139
1
2
3
4
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 is triggered or the V
OSCIN/OSCOUT: Input/Output Oscillator pin. These pins connect a parallel-resonant
crystal, or an external source, to the on-chip oscillator.
V
V
Alternate functions: Several pins of the I/O ports assume software programmable
alternate functions as shown in the pin description.
Note 1: Adding two 100 nF decoupling capacitors on the Reset pin (respectively connected
to VDD and VSS) will significantly improve product electromagnetic susceptibility
performance.
To enhance the reliability of operation, it is recommended that V
together on the application board. This also applies to V
The USBOE alternate function is mapped on Port C2 in QFN40 devices. In SO24 devices it
is mapped on Port B1.
The timer OCMP1 alternate function is mapped on Port A6 in QFN40 pin devices. In SO24
devices it is not available.
Legend / abbreviations for
Type:
In/Output level: CT = CMOS 0.3 V
Output level:
Port and control configuration:
●
●
The RESET configuration of each pin is shown in bold. This configuration is kept as long as
the device is under reset state.
DD
DDA
/V
Input:
Output:
/V
SS
SSA
(see Note 2): Main power supply and ground voltages.
(see Note 2): Power supply and ground voltages for analog peripherals.
OD = open drain, PP = push-pull, T = True open drain
I = input, O = output, S = supply
10 mA = 10 mA high sink (Fn N-buffer only)
25 mA = 25 mA very high sink (on N-buffer only)
float = floating, wpu = weak pull-up, int = interrupt
Figure
DD
is low. It can be used to reset external peripherals.
DD
2,
/ 0.7 V
Figure 3
DD
with input trigger
and
Table
SSA
2,
and V
Table
DDA
SS
3:
and V
.
DD
be connected
ST7260xx