SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 136

• 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

C161U
Parallel Ports
8
Parallel Ports
In order to accept or generate single external control signals or parallel data, the C161U
provides up to 56 parallel I/O lines. C161U features Port 0 (inculdes 8 bit P0H and 8 bit
P0L), Port 1 (8 bit P1H and 8 bit P1L), Port 2 (2 bit), Port 3 (10 bit), Port 4 (5 bit) and
Port 6 (7 bit).
These port lines may be used for general purpose Input/Output controlled via software
or may be used implicitly by C161U’s integrated peripherals or the External Bus
Controller.
All port lines are bit addressable, and all input/output lines are individually (bit-wise)
programmable as inputs or outputs via direction registers. The I/O ports are true
bidirectional ports which are switched to high impedance state when configured as
inputs. The output drivers of the I/O ports (P0H, P1, P2, P3, P4, P6) can be configured
(pin by pin) for push/pull operation or open-drain operation via control registers. The logic
level of a pin is clocked into the input latch once per state time, regardless whether the
port is configured for input or output.
A write operation to a port pin configured as an input (DPx.y = ’0’) causes the value to
be written into the port output latch, while a read operation returns the latched state of
the pin itself. A read-modify-write operation reads the value of the pin, modifies it, and
writes it back to the output latch.
Writing to a pin configured as an output (DPx.y=‘1’) causes the output latch and the pin
to have the written value, since the output buffer is enabled. Reading this pin returns the
value of the output latch. A read-modify-write operation reads the value of the output
latch, modifies it, and writes it back to the output latch, thus also modifying the level at
the pin.
Data Sheet
136
2001-04-19