peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 27

• Manufacturer Part Number: peb2255
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

Table 1
Pin No.
53
56
Data Sheet
Pin Definitions - Microprocessor Interface (cont’d)
Symbol
BHE/BLE I + PU
INT
Input (I)
Output (O)
Supply (S)
O/oD
Function
Bus High Enable (Intel bus mode)
If 16-bit bus interface mode is enabled, this
signal indicates a data transfer on the upper
byte of the data bus (D8 … D15). In 8-bit bus
interface mode this signal has no function and
should be tied to
Bus Low Enable (Motorola bus mode)
If 16-bit bus interface mode is enabled, this
signal indicates a data transfer on the lower
byte of the data bus (D0 … D7). In 8-bit bus
interface mode this signal has no function and
should be tied to
Interrupt Request
INT serves as general interrupt request which
may include all interrupt sources. These
interrupt sources can be masked via registers
IMR0 … 5. Interrupt status is reported via
registers GIS (Global Interrupt Status) and
ISR0 … 3,5.
Output characteristics (push-pull active low/
high, open drain) are determined by
programming the IPC register.
(oD = open drain output)
27
V
V
DD
DD
.
.
Pin Descriptions
FALC-LH V1.3
PEB 2255
2000-07