參數(shù)資料
型號: TUSB5052B
廠商: Texas Instruments, Inc.
英文描述: USB to 2-Serial + 1-Parallel Controller With Configurable Optional Hub
中文描述: USB轉2 -串行接口1 -可配置可選并行控制器集線器
文件頁數(shù): 16/84頁
文件大小: 276K
代理商: TUSB5052B
3–4
Table 3–2. Internal/External Microcontroller Signals Defintion
EXTEN* =1; INTERNAL MICROCONTROLLER
EXTEN* =0; EXTERNAL MICROCONTROLLER
P1.[7–0]
Port-1: 8-bit GPIO
I/O
P0.[7–0]
8-Bit data/address bus
I/O
P3.0
GPIO/ RxD
I/O
AD8
Address line A8
I
P3.1
GPIO/ TxD
I/O
AD9
Address line A9
I
P3.3
GPIO/INT1*
I/O
AD10
Address line A10
I
P3.4
GPIO/T0
I/O
P3.4
Address line A15
I
LED–1
LED-1 output
O
ALE
Address latch enable
I
LED–2
LED-2 output
O
XINTO*
Interrupt output
O
LED–3
LED-3 output
O
WR*
External data memory write strobe
I
LED–4
LED-4 output
O
RD*
External data memory read strobe
I
3.1
Hub-Ports LED Status Definition
Four LED outputs are provided to indicate the corresponding USB port states (LED-1 corresponds to Port-1, etc.).
All the LED signals are CMOS with
±
4
-mA sink/drive capability. Table 3–3 describes the LED signal level with its
corresponding port states. The colors generated correspond to the circuit implementation shown in Figure 3–2.
Table 3–3. Relation Between LEDs Signal and Hub-Port States
PORT-POWERED
ENABLED OR
SUSPENDED
DEVICE CONNECTED
SUSP-
SIGNAL
LEDn OUTPUT
COLOR
No
X
X
1
Flash (see Note 9)
Red/Green
Yes
X
No
1
1
Red
Yes
Yes
Yes
1
0
Green
Yes
No
Yes
1
Flash (see Note 9)
Red/Green
X
X
X
0
3-State
Blank
NOTE 6: LED output is 512 ms on and 512 ms off
Green
Red
1.5 k
1.5 k
1.5 k
LEDn
SUSP
To All LEDs
Figure 3–2. Dual LED Connection to LED and SUSP Signals
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