SP37E760 Datasheet, PDF (11/78 Pages) SMSC Corporation – 3.3 V I/O CONTROLLER FOR EMBEDDED APPLICATIONS

PIN #
TQFP
QFP
57
59
NAME
Printer
Selected
Status
SYMBOL
SLCT
BUFFER
TYPE
I/OD12
DESCRIPTION
This high active output from the printer indicates that
it has power on. Bit 4 of the Printer Status Register
reads the SLCT input. Refer to Parallel Port
description for use of this pin in ECP and EPP mode.
73
75
nError
nERROR
I/OD12 ^{A low on this input from the printer indicates that there}
is a error condition at the printer. Bit 3 of the Printer
Status register reads the nERR input. Refer to
Parallel Port description for use of this pin in ECP and
EPP mode.
69-66, 64 71-68, 66 Port Data 0- ^PD0-4
Port Data 4
IOP14/IS ^{Port Data 0-4}
63
65
Port Data 5 PD5
62
64
Port Data 6 ^PD6
IOP14
IOP14/
OD12
Port Data 5
Port Data 6
61
63
Port Data 7 PD7
IOP14 Port Data 7
MISC
18
20
14.318 MHz CLK14
ICLK The external connection to a single source 14.318
Input Clock
MHz clock.
92
94
Address X/ nADRX
O12/ OD12 ^{Active low address decode out: used to decode a 1,}
Interrupt
8, or 16 byte address block. (An external pull-up is
Request B
required). Refer to Configuration registers CR03,
CR08 and CR09 for more information.
IRQ_B
The interrupt request from a logical device or IRQIN
may be output on IRQ_B. Refer to the configuration
registers for more information. If EPP or ECP Mode
is enabled, this output is pulsed low and released to
allow sharing of interrupts.
56
58
Power Good ^PWRGD
I/O4 ^{This active high input indicates that the power (VCC)}
is valid. For device operation PWRGD must be
active. When PWRGD is inactive, all inputs are
disconnected and put into a low power mode; all
outputs are put into high impedance. The contents af
all registers are preserved as long as VCC is valid.
The output driver current drain when PWRGD is
inactive mode drops to I_STBY - standby current.
96
98
External
Interrupt Input
13,70
4, 10, 11,
12, 14, 15,
23, 45,
65, 93
1, 2, 3, 5,
6, 7, 8, 9,
16, 21, 24,
99, 100
15,72
6, 12, 13,
14, 16, 17,
25, 47,
67, 95
1, 2, 3, 4,
5, 7, 8, 9,
10, 11, 18,
23, 26,
Power
Ground
Non Connect
IRQIN
VCC
VSS
NC
IS
This pin is used to steer an interrupt signal from an
external device onto one of eight IRQ outputs IRQA-
H.
POWER INTERFACE
Positive Supply Voltage.
Ground Supply.
Non-Connected Pins
SMSC DS – SP37E760
Page 11
Rev. 04/13/2001