xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 3

• Manufacturer Part Number: xrt94l33
• Description: Multi-channel, Multi-function Device Aggregates 3 Ds3/e3/sts-1 Into Oc3/stm-1
• Manufacturer: Exar Corporation

xr
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
PIN DESCRIPTION of the XRT94L33 (Rev. B)
AD25
AD23
AC21
P
Y22
IN
#
S
IGNAL
PTYPE_0
PTYPE_1
PTYPE_2
PCLK
N
AME
I/O
I
I
S
T
TTL
TTL
IGNAL
YPE
M
ICROPROCESSOR
Microprocessor Interface Clock Input:
This clock input signal is only used if the Microprocessor
Interface has been configured to operate in one of the
Synchronous Mode (e.g., Power PC 403 Mode).
Microprocessor Interface is configured to operate in one of these
modes, then it will use this clock signal to do the following.
• To sample the CS*, WR*/R/W*, A[14:0], D[7:0], RD*/DS* and
DBEN input pins, and
• To update the state of D[7:0] and the RDY/DTACK output
signals.
NOTES:
Microprocessor Type Select input:
These three input pins permit the user to configure the
Microprocessor Interface block to readily support a wide variety
of Microprocessor Interfaces.
settings
Microprocessor Interface configuration is presented below.
PTYPE[2:0]
100
000
001
010
011
101
111
1.
2.
3
I
NTERFACE
The Microprocessor Interface can work with µPCLK
frequencies ranging up to 33MHz.
This pin is inactive if the user has configured the
Microprocessor Interface to operate in either the Intel-
Asynchronous or the Motorola-Asynchronousl Modes.
In this case, the user should tie this pin to GND.
of
Microprocessor Interface Mode
these
Intel-Asynchronous Mode
Motorola – Asynchronous Mode
Intel X86
Intel I960
IDT3051/52 (MIPS)
Power PC 403 Mode
Motorola 860
input
D
ESCRIPTION
pins
The relationship between the
and
the
corresponding
XRT94L33
Rev.1.2.0.
If the