EM77950
BB Controller
7.4 Code Option (ROM-0x2FFF)
Register SCLK is located on the very last bit of EM77950’s 12K program ROM. These
values will be fetched first to be the system initial values as power-on.
SCLKC: System Clock Control Register
SCLKC
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0x2FFF
-
-
-
RFCLK1 RFCLK0 SCLK1
SCLK0
SCLKC
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
0x2FFF
-
-
-
-
-
-
-
-
Bit 1 ~ Bit 2 (SCLKS1 ~ SCLKS0): System Clock Frequency Select Control Bits
SCLK1
SCLK0
System Clock (MHz)
0
0
1
1
0
1
0
1
6
12
24
48
Bit 3 ~ Bit 4 (RFCK1 ~ RFCK0): Wireless Modem Clock Frequency Select Control Bits
RFCLK1
RFCLK0
System Clock (MHz)
0
0
1
1
0
1
0
1
6
12
24
48
Bit5 ~ 15: Reserved
SCLK [1:0] RFCLK [1:0] WDT_CON.GREEN SYS CLK
RF CLK
Note
1~20MHz
(6MHz)
00
00
0
Bypass
Bypass
00/01/10/11
01/10/11
01/10/11
0
0
1
6/12/24/48
12/24/48
IRC
12/24/48
6/12/24/48
6/12/24/48
00/01/10/11
00/01/10/11 00/01/10/11
BB enable
38 •
Product Specification (V1.0) 10.09.2007
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
