參數(shù)資料
型號: XRT83VSH38IB
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: 8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
中文描述: DATACOM, PCM TRANSCEIVER, PBGA225
封裝: 19 X 19 MM, 1 MM PITCH, PLASTIC, BGA-225
文件頁數(shù): 45/76頁
文件大小: 722K
代理商: XRT83VSH38IB
XRT83VSH38
42
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 XRT83VSH38 supports an Intel asynchronous interface and Motorola 68K asynchronous
interface. The microprocessor interface is selected by the state of the μPTS[2:1] input pins. Selecting the
microprocessor interface is shown in
Table 13
.
The XRT83VSH38 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 34
.
T
ABLE
13: S
ELECTING
THE
M
ICROPROCESSOR
I
NTERFACE
M
ODE
μ
PTS[2:1]
M
ICROPROCESSOR
M
ODE
0h (00)
Intel 68HC11, 8051, 80C188
(Asynchronous)
1h (01)
Motorola 68K (Asynchronous)
F
IGURE
34. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
THE
M
ICROPROCESSOR
I
NTERFACE
B
LOCK
Microprocessor
Interface
WR_R/W
RD_DS
ALE
μPTS [2:1]
RDY
INT
Reset
CS
ADDR[7:0]
DATA[7:0]
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