S3C9454B View Datasheet(PDF) - Samsung
Part Name
Description
MFG CO.
'S3C9454B' PDF : 199 Pages View PDF
S3C9454B/F9454B
ADDRESS SPACES
Smart Option
Smart option is the ROM option for starting condition of the chip.
The ROM addresses used by smart option are from 003CH to 003FH. The S3C9454B/F9454B only use 003EH,
003FH. Not used ROM address 003CH, 003DH should be initialized to be initialized to 00H. The default value of
ROM is FFH (LVR enable, internal RC oscillator).
ROM Address: 003CH
MSB .7 .6 .5 .4 .3 .2 .1 .0 LSB
MSB .7
Must be initialized to 00H.
ROM Address: 003DH
.6 .5 .4 .3 .2 .1
.0 LSB
Must be initialized to 00H.
ROM Address: 003EH
MSB .7 .6 .5 .4 .3 .2 .1 .0 LSB
LVR enable/disable bit:
0 = Disable
1 = Enable
LVR level selection bits:
11001 = 2.3 V
10010 = 3.0 V
01100 = 3.9 V
Not used
ROM Address: 003FH
MSB .7 .6 .5 .4 .3 .2 .1 .0 LSB
Not used.
NOTES:
1. When you use external oscillator, P1.0, P1.1 must be set to output
port to prevent current consumption.
2. The value of unused bits of 3EH, 3FH is don't care.
3. When LVR is enabled, LVR level must be set to appropriate value,
not default value.
Oscillator selection bits:
00 = External crystal/
ceramic oscillator
01 = External RC
10 = Internal RC (0.5 MHz in VDD = 5 V)
11 = Internal RC (3.2 MHz in VDD = 5 V)
Figure 2-2. Smart Option
2-3
Share Link: 
