ST10F269-T3 STMicroelectronics, ST10F269-T3 Datasheet - Page 58

• Manufacturer Part Number: ST10F269-T3
• Manufacturer: STMicroelectronics

Specifications of ST10F269-T3

• Cpu Family: ST10
• Device Core Size: 16b
• Frequency (max): 32MHz
• Interface Type: ASC/I2C/SSC
• Program Memory Type: Flash
• Program Memory Size: 256KB
• Total Internal Ram Size: 12KB
• # I/os (max): 111
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 16-chx10-bit
• Instruction Set Architecture: CISC/RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: TQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

ST10F269-T3
Figure 20 : Hysteresis for Special Input Thresholds
12.2.3 - Output Driver Control
The port output control registers POCONx allow
to select the port output driver characteristics of a
port. The aim of these selections is to adapt the
output drivers to the application’s requirements,
and to improve the EMI behaviour of the device.
Two characteristics may be selected:
Edge characteristic defines the rise/fall time for
the respective output. Slow edges reduce the
peak currents that are sinked/sourced when
changing the voltage level of an external
capacitive load. For a bus interface or pins that are
changing at frequency higher than 1MHz,
however, fast edges may still be required.
Driver characteristic defines either the general
driving capability of the respective driver, or if the
POCONx (F0yyh / zzh) for 8-bit Ports
POCONx (F0yyh / zzh) for 16-bit Ports
Note: In case of reading an 8 bit P0CONX register, high Byte (bit 15.8) is read as 00h
58/162
PNxEC
PNxDC
15
15
-
PN3DC
RW
Bit
Hysteresis
Input level
Bit state
14
14
-
13
13
-
PN3EC
Port Nibble x Edge Characteristic (rise/fall time)
00:
01:
10:
11:
Port Nibble x Driver Characteristic (output current)
00:
01:
10:
11:
RW
12
12
-
Fast edge mode, rise/fall times depend on the size of the driver.
Slow edge mode, rise/fall times ~60 ns
Reserved
Reserved
High Current mode:
Driver always operates with maximum strength.
Dynamic Current mode:
Driver strength is reduced after the target level has been reached.
Low Current mode:
Driver always operates with reduced strength.
Reserved
11
11
-
PN2DC
RW
10
10
-
9
9
-
PN2EC
RW
8
8
-
ESFR
ESFR
driver strength is reduced after the target output
level has been reached or not. Reducing the
driver strength increases the output’s internal
resistance, which attenuates noise that is
imported via the output line. For driving LEDs or
power transistors, however, a stable high output
current may still be required as described below.
This rise / fall time of 4 I/O pads (a nibble) is
selected using 2-bit named PNxEC. That means
Port Nibble (x = nibble number, it could be 3 as for
Port 2.15 to 2.12) Edge Characteristic.
The sink / source capability of the same 4 I/O
pads is selected using 2-bit named PNxDC. That
means Port Nibble (x = nibble number) Drive
Characteristic (See Table 14).
7
7
PN1DC
PN1DC
Function
RW
RW
6
6
5
5
PN1EC
PN1EC
RW
RW
4
4
3
3
PN0DC
PN0DC
RW
RW
Reset Value: 0000h
Reset Value: --00h
2
2
1
1
PN0EC
PN0EC
RW
RW
0
0