Chapter 2. Architecture
Clock Generator
The GMS300 series has an internal clock oscillator. The oscillator circuit is
designed to operate with an external ceramic resonator. Internal capacitors are
available as a masked option. Oscillator circuit is able to organize by connecting
ceramic resonator to outside. (In order to built in capacitor for oscillation as
masked option.)
* It is necessary to connect capacitor to outside in order to change ceramic
resonator, You must examine refer to a manufacturer`s
22
OSC2
23
OSC1
Pulse generator
The following frequency and duty ratio are selected for carrier signal outputted
from the REMOUT port depending on a PMR (Pulse Mode Register) value set in
a program.
T
T1
PMR
REMOUT signal
T1/T = 1/2
0
1
2
3
4
5
T=1/fPUL = 12/fOSC
,
,
T=1/fPUL = 12/fOSC
T1/T = 1/3
T=1/fPUL = 8/fOSC
T=1/fPUL = 8/fOSC
,
,
T1/T = 1/2
T1/T = 1/4
T=1/fPUL = 11/fOSC
,
T1/T = 4/11
No Pulse (same to D0~D9)
0
* Default value is
Table 2-2 PMR selection table
2 - 6
HYNIX [ HYNIX SEMICONDUCTOR ]
