SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 223

• Manufacturer Part Number: SAF-C161U-LF V1.3
• Description: IC MCU ISDN 16BIT TTL TQFP-100
• Manufacturer: Infineon Technologies
• Series: C16xxr

Specifications of SAF-C161U-LF V1.3

• Core Processor: C166
• Core Size: 16-Bit
• Speed: 36MHz
• Connectivity: EBI/EMI, SPI, UART/USART, USB
• Peripherals: POR, PWM, WDT
• Number Of I /o: 56
• Program Memory Type: ROMless
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: SAFC161ULFV1.3X; SAFC161ULFV13XP; SP000007502

Table 38
The incremental encoder can be connected directly to the microcontroller without
external interface logic. In a standard system, however, comparators will be employed
to convert the encoder’s differential outputs (e.g. A, A) to digital signals (e.g. A). This
greatly increases noise immunity.
Note: The third encoder output T0, which indicates the mechanical zero position, may
Figure 63
For incremental interface operation the following conditions must be met:
Bitfield T3M must be ’110
Pins associated to lines T3IN and T3EUD must be configured as input.
Bit T3UDE must be ’1’ to enable automatic direction control.
The maximum input frequency which is allowed in incremental interface mode is f
(FM = 1). To ensure that a transition of any input signal is correctly recognized, its level
should be held high or low for at least 4 f
In Incremental Interface Mode the count direction is automatically derived from the
sequence in which the input signals change, which corresponds to the rotation direction
of the connected sensor. The table below summarizes the possible combinations.
Data Sheet
T3I
0 0 0
0 0 1
0 1 0
0 1 1
1 X X
be connected to an external interrupt input and trigger a reset of timer T3.
Core Timer T3 (Incremental Interface Mode) Input Edge Selection
Interfacing the Encoder to the Microcontroller
Triggering Edge for Counter Increment / Decrement
None. Counter T3 stops.
Any transition (rising or falling edge) on T3IN.
Any transition (rising or falling edge) on T3EUD.
Any transition (rising or falling edge) on any T3 input (T3IN or T3EUD).
Reserved. Do not use this combination
External
Encoder
T0
T0
A
A
B
B
B
’ or ‘111
B
’.
Timer
Signal Conditioning
223
cycles (FM = 1) before it changes.
+
+
+
-
-
-
A
B
T0
General Purpose Timer Unit
T3input
T3input
Interrupt
Micro-
controller
2001-04-19
C161U
Timer
/8