Table of Contents
Advertisement
18.1 Meter Controller/Driver Functions
The meter controller/driver is a function to drive a stepping motor for external meter control or cross coil.
• Can set pulse width with a precision of 8 bits
• Can set pulse width with a precision of 8 + 1 bits with 1-bit addition function
• Can drive up to four 360˚ type meters
Figure 18-1 shows the block diagram of the meter controller/driver, Figure 18-2 shows 1-bit addition circuit block
diagram.
PCS PCE
f
X
Selector
f
/2
X
Compare register
(MCMPn0)
Compare register
(MCMPn1)
Remark n = 1 to 4
CHAPTER 18 METER CONTROLLER/DRIVER
Figure 18-1. Meter Controller/Driver Block Diagram
Internal bus
Timer mode control register (MCNTC)
8-bit timer register
f
CC
1-bit addition circuit
1-bit addition circuit
2
TENn
ADBn1
ADBn0
DIRn1 DIRn0
Compare control register n (MCMPCn)
Internal bus
Port mode control register (PMC)
MODn ENn
OVF
MODn
S
Q
Output control circuit
R
MODn ENn
S
Output control circuit
Q
R
2
ENn
SMn1 (sin+)
SMn2 (sin–)
SMn3 (cos+)
SMn4 (cos–)
213
Advertisement
Table of Contents
