參數(shù)資料
型號(hào): XRT83SH38_0609
廠商: Exar Corporation
英文描述: 8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
中文描述: 8通道的T1/E1/J1短途線路接口單元
文件頁(yè)數(shù): 47/78頁(yè)
文件大?。?/td> 606K
代理商: XRT83SH38_0609
XRT83SH38
44
REV. 1.0.7
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
6.2
Parallel Microprocessor Interface Block
The Parallel Microprocessor Interface section supports communication between the local microprocessor (μP)
and the LIU. The XRT83SH38 supports an Intel asynchronous interface, Motorola 68K asynchronous, and an
Intel/Motorola interface. The microprocessor interface is selected by the state of the μPTS[1:0] input pins.
Selecting the microprocessor interface is shown in
Table 14
.
The XRT83SH38 uses multipurpose pins to configure the device appropriately. The local μP configures the
LIU by writing data into specific addressable, on-chip Read/Write registers. The microprocessor interface
provides the signals which are required for a general purpose microprocessor to read or write data into these
registers. The microprocessor interface also supports polled and interrupt driven environments. A simplified
block diagram of the microprocessor is shown in
Figure 35
.
T
ABLE
14: S
ELECTING
THE
M
ICROPROCESSOR
I
NTERFACE
M
ODE
μ
PTS[1:0]
M
ICROPROCESSOR
M
ODE
0h (00)
Intel 68HC11, 8051, 80C188
(Asynchronous)
1h (01)
Motorola 68K (Asynchronous)
2h (10)
Intel x86 (Synchronous)
3h (11)
860 Motorola (Synchronous)
F
IGURE
35. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
THE
M
ICROPROCESSOR
I
NTERFACE
B
LOCK
Microprocessor
Interface
WR_R/W
RD_DS
ALE
μPType [1:0]
RDY
INT
Reset
μPclk
CS
ADDR[7:0]
DATA[7:0]
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