TMC2005 Ver la hoja de datos (PDF) - SMSC -> Microchip
Número de pieza
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Lista de partido
TMC2005 Datasheet PDF : 32 Pages
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PORT GROUP
The five ports can be divided into three groups (group A: two ports, group B: two ports, extension port: one port) and
each group can select TX/RX polar, noise cut mode, and big jitter mode respectively. Select pins for each group are
as follows:
FUNCTION
RECEIVE
TRANSMIT
RX POLARITY
TX POLARITY
TX CONTROL
NOISE CUT
BIG JITTER
EXTENSION
GROUP A
RXINA0, 1
TXENA0, 1
SA
LA
MA
nMBA
nBJA
GROUP B
RXINB0, 1
TXENB0, 1
SB
LB
MB
nMBB
nBJB
EXTENSION
EXTRX
EXTTX
SE
LE
ME
nMBE
nBJE
nEXTOD
Various Setup
SA, SB, SE
1
0
0
1
Example For Operation Mode Setup To Each Port
LA, LB, LE MA, MB, ME RX POLAR TX POLAR
TRANSCEIVER
0
1
Active Low Active Low HYC2485S/HYC2488S
1
0
Active High Active High Optical Transceiver
0
1
Active High Active Low HYC9088/HYC9068
1
1
Active Low Active High RS485 Transceiver
Note for Unused port
Unused ports can be left open because RX port (RX input), RX polar (S input), TX polar (L input), TX control (M
input) pins have internal pull-up resistors. Because of internal pull-up resistors, select pins for noise cut (nMB
input), big jitter (nBJ input) can be left open when used for setting “OFF”.
Example for Power-On Reset Circuit
+5V
Rp
10K
3
Cp
4.7uF
TMC2005
2
39
nRST
Ct
0.1uF
MB3771/NJM2103
11
2 2T
3
2T
4 2T
2T 8
2T 7
6
2T
2T 5
TMC2005
39 nRST
+5V
POWER-ON RESET CIRCUIT (C, R)
POWER-ON RESET CIRCUIT (POR IC)
FIGURE 9 - POWER-ON RESET
SMSC DS – TMC2005
Page 21
Rev. 10/24/2000
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