THM3561 Datasheet, PDF (15/21 Pages) THine Electronics, Inc. – Stepping Motor Driver with LVDS Interface

THM3561_Rev1.01_E
Functional Description (continued)
ODSDRn Pin Settings
In case of using the multi-drop connection, the sensor can be used based on setting SDR_OUT of the post-stage
device as open drain and setting SDR_IN input of the pre-stage device as pull-up.
SDR_OUT output pin becomes the open drain output by fixing the ODSDRn pin to Low level. Set the pull-up as
ON in register settings (SDR_PUPn=0) in the opposite pre-stage device.
When connection with a pre-stage device becomes the cascade connection (1:1), fix the ODSDRn pin to High level
and use it as a push-pull output. It is recommended that at this time the pull-up be set to OFF in the register settings of
the pre-stage device, since the electricity consumption for Low level output lowers.
Address specification mode can be used at the time of multi drop connection. See the Communication Protocol
section described below) and shift resistor mode cannot be used.
Device Address Setting
The least significant 5 bits out of the device address 8 bits of the serial interface are set using pins A0 to A4. The
most significant 3 bits are fixed to 3’b010 and these are classified as the communication for the LED driver LSI
THL35XX series (most significant 2 bits are 2’b00) made by our company.
(Internal fix)
010
00
Table 16. Device Address Setting
Pin setting
A4 A3 A2 A1 A0
Device operation
0 0 0 0 0 Only work with broadcast address mode
00001
Work with broadcast and address assign mode.
|
(Please use it within this range.)
11110
1 1 1 1 1 Register write-protected (use of repeater )
A5 – A0
(Ref.) LED driver THL35xx series
(Setting example) In the case of terminals A4=Low, A3=Low, A2=Low, A1=Low, A0=High,
The device address is set to 8’b01000001 (=8’h41).
When all pins A0 to A4 are set to High level (device address 8’b01011111=8’h5F), register writing on this device is
disabled. In the case of using only 3-wire CMOS → 3-wire CMOS repeater function or 4-wire CMOS → 3-wire
CMOS bridge function without using the motor driver output of the wire bridge function, set all A0 to A4 to High
level.
The device address 8’b01000000 (=8’h40) becomes the device address for writing on all the connected motor
drivers (broadcast). When all A0 to A4 are set to Low level, the device operates only by broadcast specification. Set
the device address within the range from 8’b01000001 (=8’h41) to 8’b01011110(=8’h3E).
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