M63155FP Renesas Electronics Corporation., M63155FP Datasheet - Page 20

• Manufacturer Part Number: M63155FP
• Description: 3 Phase Brushless Motor Controller
• Manufacturer: Renesas Electronics Corporation.

M63155FP
10. Braking Mode Enable (BRK)
TABLE 2. BRK Selection Truth Table
BRK
High
Low
11. Voltage Monitor (VM, SVCC, FLT)
Rev.1.0, Sep.16.2003, page 20 of 40
SVcc or VM
In the normal motor rotation, the motor is able to be braked optionally by external control signal put into the BRK
terminal. The braking mode, either coast (free-run) or brake (short-brake) is selected by the BRS terminal (cf. 12.
Brake Mode Selection -1)).
Table 2. gives the BRK selection truth table.
If either the motor power supply (VM) or the 5V (SVCC) or both drops below the threshold, FLT is “Low”. At this
time, the BRS state (cf. 12. Braking Mode Selection) is latched by this FLT “L” signal and keeps its state. (a
detailed explanation is given under item “18. Protection circuit” on page 23.)
Then, the return of the FLT is decided by conditions of the Voltage Monitor comparator output and Reset input
(RST).
RST
FLT
(normal)
H
H
(fault)
L
FLT:Low latch
Fig.10 Voltage Monitor Circuit & Timing Chart
H
L
Function Mode
Normal Control Mode
Brake Mode
RST:L
FLT:latch cancel
H
SVcc or VM
RST
FLT
(normal)
H
H
(fault)
L
RST:L
FLT:High
H
L
RST:H and Voltage fault keeps
FLT:latch cancel
H
L