Rainbow Electronics LM93 - Manual (Page 63)

16.0 Registers
(Continued)
16.8.2 Register BDh Special Function Control 2 (Smart Tach Mode Enable and Fan Control Temperature Resolution
Control)
Register
Address
Read/
Write
Register
Name
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Default
Value
BDh R/W
Special Function
Control 2
RES RES
ZN34
_RS
ZN12
_RS
STE4 STE3 STE2 STE1 00h
Bit Name R/W Description
0 STE1 R/W Enable Smart Tach for Tach 1
1 STE2 R/W Enable Smart Tach for Tach 2
2 STE3 R/W Enable Smart Tach for Tach 3
3 STE4 R/W Enable Smart Tach for Tach 4
4 ZN12_RS R/W When this bit is set, the auto fan control will use
0.5˚C of resolution for zones 1 and 2
5 ZN34_RS R/W When this bit is set, the auto fan control will use
0.5˚C of resolution for zones 3 and 4
6 RES R Reserved
7 RES R Reserved
Application Note: Enabling Smart Tach mode is not supported while either PWM output is configured for 22.5 kHz. The behavior
of the part is undefined if this configuration is programmed. Register E0h Special Function TACH to PWM Binding must be setup
when Smart Tach modes are enabled.
16.8.3 Register BEh GPI/VID Level Control
Register
Address
Read/
Write
Register
Name
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Default
Value
BEh R/W
GPI/VID
Level Control
GPI7
_LVL
GPI6
_LVL
GPI5
_LVL
GPI4
_LVL
RES
P2_VID
_LVL
P1_VID
_LVL
00h
Bit Name R/W Description
0 P1_VID_LVL R/W If set, P1_VIDx inputs use alternate lower V
IH
and V
IL
levels
1 P2_VID_LVL R/W If set, P2_VIDx inputs use alternate lower V
IH
and V
IL
levels
3:2 RES R Reserved
4 GPI4_LVL R/W If set, GPIO4 input use alternate lower V
IH
and V
IL
levels
5 GPI5_LVL R/W If set, GPIO5 input use alternate lower V
IH
and V
IL
levels
6 GPI6_LVL R/W If set, GPIO6 input use alternate lower V
IH
and V
IL
levels
7 GPI7_LVL R/W If set, GPIO7 input use alternate lower V
IH
and V
IL
levels
See the DC Electrical Characteristics for exact V
IH
and V
IL
levels.
LM93
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