Legacy-Free Keyboard/Embedded Controller with SPI and LPC Docking Interface
Table 19.6 FAN2 Pulse Counter Preload Register
N/A
HOST ADDRESS
8051 ADDRESS
POWER
0x7F9E
VCC1
0x00
DEFAULT
BIT
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
-
-
-
-
-
HOST TYPE
8051 R/W
BIT NAME
R/W
D7
R/W
D6
R/W
D6
R/W
D6
R/W
D3
R/W
D2
R/W
D1
R/W
D0
19.8
FAN Tachometer Timebase Prescaler Register
The fan tachometer timebase prescaler register is shown below in Table 19.7. The timebase prescaler
is described in Section 19.2.1, "Timebase Prescaler," on page 211.
Table 19.7 FAN Tachometer Timebase Prescaler Register
N/A
HOST ADDRESS
8051 ADDRESS
0x7F9
F
VCC1
0x05
POWER
DEFAULT
BIT
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
-
-
-
-
-
HOST TYPE
8051 R/W
R
R
R
R
R/W
R/W
R/W
R/W
Reserved
FAN2 PRESCALER
00: Prescaler = 1
01: Prescaler = 2
(DEFAULT)
FAN1 PRESCALER
00: Prescaler = 1
01: Prescaler = 2
(DEFAULT)
BIT NAME
10: Prescaler = 4
11: Prescaler = 8
10: Prescaler = 4
11: Prescaler = 8
19.9
8051 FAN Tachometer Interrupt Registers
The FAN TACH1 and FAN TACH 2 interrupts appear in the 8051 Wake Up SRC 7 and Wake Up MSK
7 registers See Figure 7.4, Figure 7.5, Table 7.25, and Table 7.32 in Section 7.9.
Revision 1.1 (01-14-03)
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SMSC LPC47N350
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