參數(shù)資料
型號： UPD16879
廠商： NEC Corp.
英文描述： MONOLITHIC QUAD H BRIDGE DRIVER CIRCUIT
中文描述： 單片四H橋驅(qū)動電路
文件頁數(shù)： 22/32頁
文件大小： 199K
代理商： UPD16879
Data Sheet S14188EJ1V0DS00
22
μ
PD16879
[7th, 8th byte]
The 7th byte and 8th byte set the pulse cycle of the
α
channel.
The pulse cycle is specified using 16 bits: bits D0 (least significant bit) to D7 of the 7th byte, and bits D0 to D7
(most significant bit) of the 8th byte. The pulse cycle can be set to a value in the range of 222 ns to 14.563 ms in
units of 222 ns (with a 4.5 MHz clock).
Table 11 (A). 7th Byte Data Configuration (
α
channel data)
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Data
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
Table 11 (B). 8th Byte Data Configuration (
α
channel data)
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Data
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
MSB
[9th byte]
The 9th byte sets the enable, rotation, and output current of
β
channel.
The enable sets by bit D7, the rotation sets by bit D6, and the output current sets by bits D0 to D4. Bit D5 is fixed
“0”. Bit D5 isn’t use.
Table 12. 9th Byte Data Configuration (
β
channel data)
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Data
0 or 1
0 or 1
0
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
Enable sets
MSB
LSB
Rotation sets
Output current sets
Enable sets by D7 bit.
D7 bit data is “0”: Output high impedance (but, internal counter increase)
D7 bit data is “1”: Output conducts
Rotation sets by D6 bit.
D6 bit data is “0”: Forward turn (CW mode)
D6 bit data is “1”: Reverse turn (CCw mode)
Output current sets by D0 to D4 bits.
The 250 mV (typical) voltage input from external source or internal reference voltage is internally doubled and
input to a 5-bit D/A converter. By dividing this voltage by 5-bit data, a current setting reference voltage can be set
inside the IC within the range of 100 to 500 mV, in units of 20 mV. If external source is used, the V
REFsel
pin connects
V
DD
pin. If internal reference voltage is used, the V
REFsel
pin and V
REF
pin connect GND pin. The 64 steps micro-step
(setting reference voltage is maximum) control is possible.
LSB
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