pef22504 Infineon Technologies Corporation, pef22504 Datasheet - Page 39

• Manufacturer Part Number: pef22504
• Description: Quad E1/t1/j1 Line Interface Component For Long- And Short-haul Applications Pef 22504 E, Pef 22504 Ht, Version 2.1
• Manufacturer: Infineon Technologies Corporation

Table 2
Pin No.
87
86
41
91
Data Sheet
92
Name
BHE
BLE
CS
INT
READY
DTACK
READY_EN
I/O Signals for P-TQFP-144-8 (cont’d)
Pin Type
I
I
I
O
O
O
I
Buffer
Type
PU
PU
PU
–
oD
(PU)
oD
(PU)
PD
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 D(15:8). In
8-bit bus interface mode this signal has no function and
should be tied to VDD or left open.
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 D(7:0). In 8-
bit bus interface mode this signal has no function and should
be tied to VDD or left open.
Chip Select
Low active chip select.
Interrupt Request
INT serves as general interrupt request for all interrupt
sources. These interrupt sources can be masked via
registers IMR(7:0). Interrupt status is reported via registers
GIS (Global Interrupt Status) and ISR(7:0).
Output characteristics (push-pull active low/high, open drain)
are determined by programming register IPC.
Data Ready
oD output only if activated by READY_EN = 1
bus mode is selected. If not activated (READY_EN = 0
pull-up resistor is active.
Asynchronous handshake signal to indicate successful read
or write cycle.
Data Acknowledge
oD output only if activated by READY_EN = 1
motorola bus mode is selected. If not activated (READY_EN
= 0
Asynchronous handshake signal to indicate successful read
or write cycle.
Ready Enable
Activates the oD functionality of READY/ DTACK.
0
active). Pin READY/ DTACK can be connected to VDD.
1
B
B
: READY/ DTACK is not activated (only pull-up resistor is
: READY/ DTACK is an active oD output
B
39
) the pull-up resistor is active.
Rev. 1.3, 2006-01-25
Pin Descriptions
B
B
QuadLIU
PEF 22504
and if Intel
and if
B
) the
TM