ST10F280 STMicroelectronics, ST10F280 Datasheet - Page 73

• Manufacturer Part Number: ST10F280
• Description: MCU 16BIT 512K FLASH MAC 208-PBG
• Manufacturer: STMicroelectronics
• Series: ST10r

Specifications of ST10F280

• Core Processor: ST10
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: ASC, CAN, EBI/EMI, SSC
• Peripherals: POR, PWM, WDT
• Number Of I /o: 143
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 18K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 32x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 208-PBGA
• Processor Series: ST10F28x
• Core: ST10
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

12.1.2 - Input Threshold Control
The standard inputs of the ST10F280 determine the status of input signals according to TTL levels. In
order to accept and recognize noisy signals, CMOS-like input thresholds can be selected instead of the
standard TTL thresholds for all pins of Port 2, Port 3, Port4, Port 7 and Port 8. These special thresholds
are defined above the TTL thresholds and feature a defined hysteresis to prevent the inputs from toggling
while the respective input signal level is near the thresholds.
The Port Input Control register PICON is used to select these thresholds for each byte of the indicated
ports, i.e. the 8-bit ports P7 and P8 are controlled by one bit each while ports P2 and P3 are controlled by
two bits each.
PICON (F1C4h / E2h)
All options for individual direction and output mode control are available for each pin, independent of the
selected input threshold. The input hysteresis provides stable inputs from noisy or slowly changing exter-
nal signals.
Figure 28 : Hysteresis for Special Input Thresholds
12.1.3 - 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, ie. the transition time. Slow edge
reduce the peak currents that are sinked/sourced when changing the voltage level of an external capaci-
tive 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 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.
PxLIN
PxHIN
15
-
Hysteresis
Input level
Bit state
Bit
14
-
13
-
0
1
0
1
12
Port x Low Byte Input Level Selection
Pins Px.7...Px.0 switch on standard TTL input levels
Pins Px.7...Px.0 switch on special threshold input levels
Port x High Byte Input Level Selection
Pins Px.15...Px.8 switch on standard TTL input levels
Pins Px.15...Px.8 switch on special threshold input levels
-
11
-
10
-
9
-
8
-
ESFR
P8LIN P7LIN
RW
7
Function
RW
6
RW
5
-
P4LIN P3HIN P3LIN P2HIN P2LIN
RW
4
RW
3
RW
Reset Value:-00h
2
ST10F280
RW
1
73/186
RW
0