EM77950 Datasheet, PDF (46/102 Pages) ELAN Microelectronics Corp – BB Controller

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
0x2FFF
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RFCLK1 RFCLK0 SCLK1 SCLK0
SCLKC Bit 15
0x2FFF
-
Bit 14
-
Bit 13
-
Bit 12
-
Bit 11
-
Bit 10
-
Bit 9
-
Bit 8
-
Bit 1 ~ Bit 2 (SCLKS1 ~ SCLKS0): System Clock Frequency Select Control Bits
SCLK1
0
0
1
1
SCLK0
0
1
0
1
System Clock (MHz)
6
12
24
48
Bit 3 ~ Bit 4 (RFCK1 ~ RFCK0): Wireless Modem Clock Frequency Select Control Bits
RFCLK1
0
0
1
1
RFCLK0
0
1
0
1
System Clock (MHz)
6
12
24
48
Bit5 ~ 15: Reserved
SCLK [1:0] RFCLK [1:0] WDT_CON.GREEN SYS CLK
00
00
0
Bypass
00/01/10/11 01/10/11
0
6/12/24/48
01/10/11 00/01/10/11
0
12/24/48
00/01/10/11 00/01/10/11
1
IRC
RF CLK
Bypass
12/24/48
6/12/24/48
6/12/24/48
Note
1~20MHz
(6MHz)
BB enable
38 •
Product Specification (V1.0) 10.09.2007
(This specification is subject to change without further notice)