SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 207

• 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

10.5
When the external bus interface is enabled, but no external access is currently executed,
the EBC is idle. As long as only internal resources (from an architecture point of view)
like IRAM, GPRs or SFRs, etc. are used the external bus interface does not change (see
table below).
Accesses to on-chip X-Peripherals are also controlled by the EBC. However, even
though an X-Peripheral appears like an external peripheral to the controller, the
respective accesses do not generate valid external bus cycles.
Due to timing constraints address and write data of an XBUS cycle are reflected on the
external bus interface (see table below). The „address“ mentioned above includes
PORT1, Port 4, BHE and ALE which also pulses for an XBUS cycle. The external CS
signals on Port 6 are driven inactive (high) because the EBC switches to an internal XCS
signal.
The external control signals (RD and WR or WRL/WRH if enabled) remain inactive
(high).
Table 34
Data Sheet
Pins
PORT0
PORT1
Port 4
Port 6
BHE
ALE
RD
WR/WRL
WRH
EBC Idle State
Internal accesses only
Tristated (floating)
Last used external address
(if used for the bus interface)
Last used external segment address
(on selected pins)
Active external CS signal
corresponding to last used address
Level corresponding to last external
access
Inactive (low)
Inactive (high)
Inactive (high)
Inactive (high)
Status of the external bus interface during EBC idle state:
207
XBUS accesses
Tristated (floating) for read
accesses
XBUS write data for write accesses
Last used XBUS address
(if used for the bus interface)
Last used XBUS segment address
(on selected pins)
Inactive (high) for selected CS
signals
Level corresponding to last XBUS
access
Pulses as defined for X-Peripheral
Inactive (high)
Inactive (high)
Inactive (high)
External Bus Interface
2001-04-19
C161U