SNL320
16-Bit LCD Controller
0x0000
:
:
Free for User
1KW
0x03FF
0x0400
:
:
:
:
:
:
No Used
0x0FFF
0xA000
:
:
:
:
:
:
Reserved for System
& User
4KW
LCD buffer start pointer
0xAFFF
0xB000
:
:
:
:
:
:
LCD Display Buffer
4KW
0xBFFF
5.
Clock System
SNL320 is a dual clock system that it both provides high-speed clock (16MHZ) and
low-speed clock (32768HZ). There two different way to get the hi-speed clock, one is
generate by external 16MHZ crystal and another way is through external 6MHZ
pumping to 16MHZ by the internal PLL circuit.
The pin option “PLLEn” is used to enable/disable internal PLL circuit.
PLLEn
PCR.STPCK
CKSEL
RCTune
PCR.STPCK
LCD driver clock source
PLLEn
system clock
low-speed clock
XIN
6MHZ
Rosc/
X'tal
PLL
PCR.MCS
PCR.STPMD
CAP
PCR.RTCCKS
RTC
clock cource
16MHZ
/512
XOUT
Figure-1 Clock system block diagram
Ver: 1.2
7
July 22, 2005
SONIX [ SONIX TECHNOLOGY COMPANY ]
