NEC mPD780852 Series, Preliminary User'S Manual

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CHAPTER 18 METER CONTROLLER/DRIVER
Preliminary User’s Manual U14581EJ3V0UM00
(2) Compare control register n (MCMPCn)
MCMPCn is an 8-bit register that controls the operation of the compare register and output direction of the PWM
pin.
MCMPCn is set with an 8-bit memory manipulation instruction.
RESET input clears MCMPCn to 00H.
Figure 18-4 shows the MCMPCn format.
Figure 18-4. Compare Control Register n (MCMPCn) Format
Address: FF6BH to FF6EH After Reset: 00H R/W
Symbol 7 6 5 4 3 2 1 0
MCMPCn 0 0 0 TENn ADBn1 ADBn0 DIRn1 DIRn0
TENn
Note
Transfer Enable Control Bit by Register from Master to Slave
0 Disables data transfer from master to slave.
New data can be written.
1 Transfers data from master to slave when MCNT overflows.
New data cannot be written.
ADBn1 1-Bit Addition Circuit Control (cos side of meter n)
0 No 1-bit addition to PWM output
1 1-bit addition to PWM output
ADBn0 1-Bit Addition Circuit Control (sin side of meter n)
0 No 1-bit addition to PWM output
1 1-bit addition to PWM output
DIRn1 DIRn0 Output Pin Control
SMn1 SMn2 SMn3 SMn4
0 0 PWM 0 PWM 0
0 1 PWM 0 0 PWM
1 0 0 PWM 0 PWM
1 1 0 PWM PWM 0
Note TENn functions as a control bit and status flag.
As soon as the timer overflows and PWM data is output, TENn is cleared to “0” by hardware.
Caution Bits 5 to 7 must be set to 0.
Remark n = 1 to 4