參數(shù)資料
型號(hào): XR19L200IL32-0B-EB
廠商: Exar Corporation
文件頁(yè)數(shù): 37/40頁(yè)
文件大小: 0K
描述: EVAL BOARD FOR XR19L200 32QFN
標(biāo)準(zhǔn)包裝: 1
系列: *
XR19L200
6
SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
REV. 1.0.2
2.0
FUNCTIONAL DESCRIPTIONS
2.1
CPU Interface
The CPU interface is 8 data bits wide with 3 address lines and control signals to execute data bus read and
write transactions. The L200 data interface supports the Intel compatible types of CPUs and it is compatible to
the industry standard 16C550 UART. No clock (oscillator nor external clock) is required to operate a data bus
transaction. Each bus cycle is asynchronous using CS#, IOR# and IOW# or R/W# inputs. A typical data bus
interconnection for Intel and Motorola mode is shown in Figure 3.
FIGURE 3. XR19L200 TYPICAL INTEL/MOTOROLA DATA BUS INTERCONNECTIONS
VCC
A0
A1
A2
UART_CS#
IOR#
IOW#
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
CS#
D0
D1
D2
D3
D4
D5
D6
D7
IOR#
IOW#
UART_INT
INT
RS-232
Interface
Intel Data Bus Interconnections
GND
UART_RESET
RESET
16/68#
RX
TX
ACP
VCC
A0
A1
A2
UART_CS#
R/W#
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
CS#
D0
D1
D2
D3
D4
D5
D6
D7
IOR#
IOW#
UART_IRQ#
INT
Motorola Data Bus Interconnections
GND
UART_RESET#
RESET
RX
TX
ACP
VCC
16/68#
RS-232
Interface
ACP
4.7K
VCC
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