SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 217

• 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

11.1.1.1 Core Timer T3
The operation of the core timer T3 is controlled by its bitaddressable control register
T3CON.
Run Control
The timer can be started or stopped by software through bit T3R (Timer T3 Run Bit).
Setting bit T3R to ‘1’ will start the timer, clearing T3R stops the timer.
In gated timer mode, the timer will only run if T3R = ‘1’ and the gate is active (high or low,
as programmed).
Note: When bit T2RC/T4RC in timer control register T2CON/T4CON is set to ’1’, T3R
Count Direction Control
The count direction of the core timer can be controlled either by software or by the
external input line T3EUD (Timer T3 External Up/Down Control Input). These options are
selected by bits T3UD and T3UDE in control register T3CON. When the up/down control
is done by software (bit T3UDE = ‘0’), the count direction can be altered by setting or
clearing bit T3UD. When T3UDE = ‘1’, line T3EUD is selected to be the controlling
source of the count direction. However, bit T3UD can still be used to reverse the actual
count direction, as shown in the table below. If T3UD = ‘0’ and line T3EUD shows a low
level, the timer is counting up. With a high level at T3EUD the timer is counting down. If
T3UD = ‘1’, a high level at line T3EUD specifies counting up, and a low level specifies
counting down. The count direction can be changed regardless of whether the timer is
running or not.
When line T3EUD is used as external count direction control input, its associated port
pin must be configured as input.
Table 35
Data Sheet
Line
TxEUD
X
X
0
1
0
1
will also control (start and stop) auxiliary timer T2/T4.
GPT1 Core Timer T3 Count Direction Control
Bit TxUDE
0
0
1
1
1
1
Bit TxUD
0
1
0
0
1
1
Count Direction
Count Up
Count Down
Count Up
Count Down
Count Down
Count Up
217
General Purpose Timer Unit
2001-04-19
C161U