SMS44
t
t
A1, A2
PWDTO
t
t
t
t
A1 and A2 are the address inputs. When addressing the
SMS44 memory or configuration registers the address
inputs distinguish which one of four possible devices
sharing the common bus is being addressed.
0
0
0
0
0
I RQ#
SDA
RESET#
SDA is the serial data input/output pin. It should be tied to
VCC through a pull-up resistor.
t
t
PLDTO
PLDTO
t
PRTO
WLDI
SCL
SCL is the serial clock input. It should be tied to VCC
through a pull-up resistor.
2047 Fig03 1.0
Fi gure 3.
Watchdog, Longdog and WLDI Ti mi ng
t
t
t
0
0
0
I RQ#
t
PRTO
RESET#
WLDI
t
PLDTO
2047 Fig04 1.0
Fi gure 4.
Watchdog, Longdog and WLDI Ti mi ng
SUMMIT MICROELECTRONICS, Inc.
2047 2.3 10/23/00
6
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
