FDC37C935-QS Standard Microsystems (SMSC), FDC37C935-QS Datasheet - Page 119

• Manufacturer Part Number: FDC37C935-QS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37C935-QS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

General Purpose Address Decoder
General Purpose I/O pin GP14 may be
configured as a General Purpose Address
Decode Pin.
Decoder provides an output decoded from bits
A11-A1 of the 12-bit address stored in a two-
byte Base I/O Address Register (logical device 8
config registers 0x60,0x61) qualified with AEN.
Thus, the decoder provides a two address
decode where A0=X.
output is normally active low, however the
polarity may be altered through the polarity bit in
its GPI/O Configuration Register.
General Purpose Write
General Purpose I/O pin GP15 may be
configured as a General Purpose Write pin. The
General Purpose Write provides an output
decoded from the 12-bit address stored in a
two-byte Base I/O Address Register (logical
device 8 config registers 0x62,0x63) qualified
with IOW and AEN.
output
polarity may be altered through the polarity bit in
its GPI/O Configuration Register.
WDT_VAL
WDT_CFG
WDT_CTRL
CONFIG REG.
is normally active low, however the
The General Purpose Address
Table 51 - Watchdog Timer/Power LED Configuration Registers
Bits[7:0]
Bit[0]
Bit[1]
Bit[2]
Bit[3]
Bits[7:4]
Bit[0]
Bit[1]
Bit[2]
Bit[3]
Bits[7:4]
This General Purpose
This General Purpose
BIT FIELD
Binary coded time-out value, 0x00 disables the WDT.
Joystick enable
Keyboard enable
Mouse enable
Power LED toggle on WDT time-out
WDT interrupt mapping,
0000b = diables irq mapping
WDT time-out status bit
Power LED toggle
Force Timeout, self-clearing
P20 Force Timeout Enable
Reserved, set to zero
119
The
contains two bits which allow the General
Purpose Address Decode and Write functions to
be independently enabled or disabled.
Joystick Control
The Base I/O address of the Joystick (Game)
Port is fixed at address 0x201.
GP16 Joystick Function
The FDC37C93x may be configured to generate
either a Joystick Chip Select or a Joystick Read
Strobe on GP16. The polarity is programmable
through a bit in the GP16 confiugration register.
output is simply a decode of the address =
0x201
configured as a Joystick Read Strobe the output
is a decode of the address = 0x201 qualified by
IOR and AEN both active. The Joystick Chip
Select or Read Strobe is normally active low,
however its polarity is programmable through a
bit in the GP20 configuration register.
When configured as a Joystick Chip Select the
GPA_GPW_EN
qualified
DESCRIPTION
by
AEN
Configuration
active.
Register
When