F84045 Asiliant Technologies, F84045 Datasheet - Page 28

• Manufacturer Part Number: F84045
• Manufacturer: Asiliant Technologies

Specifications of F84045

• Lead Free Status / Rohs Status: Not Compliant

Data Bus (4045)
XD0:7
Interrupts
IRQ1
IRQ3:7
IRQ9:12
IRQ14:15
FERR# / IRQ13 7
IGNNE# / INTCLR# / RTCIRQ#
INTR
Timer & RTC
SPKR
32KX1/IRQ8#
32KX2
PSRSTB#
Control Link, Etc. (4045)
LIN
LOUT
Revision 1.0
22, 23, 24, 25, 26, 27, 28, 29
88
87, 86, 85, 84, 83
82, 89, 90, 91
92, 93
13
15
9
32
33
10
17
18
2/10/95
I/O
IN
IN
OUT
OUT
OUT
IN
OUT
IN
IN
OUT
Data bus. Outputs for I/O reads of internal registers. Inputs for I/O writes of internal
Interrupt inputs to the 8259s. Active high.
Dual function pin. Normally it is FERR# from the CPU and goes to the internal
Dual function pin. Normally it is IGNNE# to the CPU and comes from the internal
When PWRGOOD is low this pin provides the RTC alarm interrupt output. It is
Interrupt request to the CPU.
Speaker output.
Real time clock 32KHz crystal input. When internal RTC is disabled, the function of
Real time clock 32KHz crystal Output.
Real Time clock Power Strobe. This signal being low indicates that the real time
Control Link input from the 4041. Transfers the following information: Interrupt
Control Link output to the 4041. Transfers the following information: Port B bit 5,
registers. Also outputs to pass A10:16 to the 4041 at the start of DMA cycles.
coprocessor error logic. It may optionally be IRQ13, if the coprocessor error
logic is external (for Weitek support). IRQ13 is active high.
coprocessor error logic. It may optionally be INTCLR# (active low write strobe
for I/O ports F0 & F1), if the coprocessor error logic is external (for Weitek
support).
open collector at this time. When an RTC alarm occurs, this pin is driven low.
adequate speaker drive. When the speaker is idle (Port 61h bit 1 = '0'), this
output remains continuously high.
this pin changes to become the IRQ8# input. A logic low level on IRQ8# causes
INTR to be asserted (high), subject to the programmed INTC mode.
clock has lost power. It should be connected the 4045 VCC pins (which receive
battery backed power) through a 100K resistor, and to GND through a 0.1uF
cap.
Acknowledge cycle, CPU Reset Request, Refresh Acknowledge, and keyboard
interrupt (from internal keyboard controller).
Refresh Request, Refresh Complete, Address Strobe.
Subject to change without notice
Connected
27
to the speaker, externally buffered if needed for
Preliminary
Pin Descriptions
CS4041