EM77F900 Datasheet, PDF (50/136 Pages) ELAN Microelectronics Corp – USB HUB+BB Controller

EM77F900
USB HUB+BB Controller
Bit 0 ~ 2 (PSR0 ~ PSR2): Prescaler for TCC.
PSR2
0
0
0
0
1
1
1
1
PSR1
0
0
1
1
0
0
1
1
PSR0
0
1
0
1
0
1
0
1
Clock Rate
1:2
1:4
1:8
1:16
1:32
1:64
1:128
1:256
Bit 3 (TCCS0): Clock Source Select.
TCCS0
0
1
Clock Source
Selected PLL Clock Source
Selected ERC Clock Source
Bits 4 ~ 7 are reserved.
7.3.10 Free Run Counter Controller – FRCC (0x94)
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0 (FRCCS): Clock Source Select
FRCCS
Clock Source
0
Selected PLL Clock Source
1
Selected ERC Clock Source
Bits 1 ~ 7 are reserved.
7.3.11 Watchdog Timer Controller – WDTC (0x95)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
GREEN
-
-
WDTCE
-
RAT2
RAT1
Bit 0 ~ 2 (RAT0 ~ RAT2): WDT Prescaler
RAT2
0
0
0
0
1
1
1
1
RAT1
0
0
1
1
0
0
1
1
RAT0
0
1
0
1
0
1
0
1
Bit 4 (WDTCE): Enable the WDT Counter
0: WDT disabled
1: WDT enabled
Clock Rate
1:2
1:4
1:8
1:16
1:32
1:64
1:128
1:256
Bit 0
FRCCS
Bit 0
RAT0
42 •
Product Specification (V1.0) 07.31.2007
(This specification is subject to change without further notice)