PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 179

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

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) don’t remain
inactive during BUS accesses. When internal XRAM addresses are accessed, the
control signals show the same behavior as for external accesses.
Table 11-3
Pins
PORT0
PORT1
Port 4
Port 6
BHE
ALE
RD
WR/WRL
WRH
Data Sheet
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:
179
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
Level corresponding to last XBUS
access
Level corresponding to last XBUS
access
Level corresponding to last XBUS
access
The External Bus Interface
PSB 21473
2003-03-31
INCA-D