PEB2254H-V14 Infineon Technologies, PEB2254H-V14 Datasheet - Page 26

• Manufacturer Part Number: PEB2254H-V14
• Manufacturer: Infineon Technologies

Specifications of PEB2254H-V14

• Operating Supply Voltage (typ): 5V
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

The assignment of registers with even/odd addresses to the data lines in case of 16-bit
register access depends on the selected microprocessor interface mode:
Siemens/Intel
Motorola
Data Lines
n: even address
Complete information concerning register functions is provided in – Detailed Register
Description.
FIFO Structure
In transmit and receive direction of the signaling controller 64-byte deep FIFOs are
provided for the intermediate storage of data between the system internal highway and
the CPU interface. The FIFOs are divided into two halves of 32-bytes. Only one half is
accessible to the CPU at any time.
In case 16-bit data bus width is selected by fixing pin DBW to logical ‘1’ word access to
the FIFOs is enabled. Data output to bus lines D0-D15 as a function of the selected
interface mode is shown in figure 6 and 7. Of course, byte access is also allowed.The
effective length of the accessible part of RFIFO can be changed from 32 bytes (RESET
value) down to 2 bytes.
Semiconductor Group
D15
(Adr. n + 1)
(Adr. n)
26
D8
D7
(Adr. n)
(Adr. n + 1)
General Features E1
PEB 2254
D0
11.96