SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 211

• 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 needs access to the shared resources and demands this by activating its BREQ
output. The arbitration logic may then deactivate the other master’s HLDA and so free
the external bus for the C161U, depending on the priority of the different masters.
Note: The Hold State is not terminated by clearing bit HLDEN.
Figure 56
Note: The falling BREQ edge shows the last chance for BREQ to trigger the indicated
10.7
C161U provides an on-chip interface (the XBUS interface), which allows to connect
integrated customer/application specific peripherals to the standard controller core. The
XBUS is an internal representation of the external bus interface, ie. it is operated in the
same way.
The current XBUS interface is prepared to support up to 3 X-Peripherals.
For each peripheral on the XBUS (X-Peripheral) there is a separate address window
controlled by an XBCON and an XADRS register. As an interface to a peripheral in many
cases is represented by just a few registers, the XADRS registers select smaller address
Data Sheet
regain-sequence. Even if BREQ is activated earlier the regain-sequence is
initiated by HOLD going high. BREQ and HOLD are connected via an external
arbitration circuitry. Please note that HOLD may also be deactivated without the
C161U requesting the bus.
HOLD
HLDA
BREQ
CSx
Other
Signals
XBUS Interface
External Bus Arbitration, (Regaining the Bus)
211
External Bus Interface
MCD02236
2001-04-19
C161U