5962F0252302VXC View Datasheet(PDF) - Aeroflex UTMC
Part Name
Description
Manufacturer
5962F0252302VXC Datasheet PDF : 41 Pages
| |||
QFP Pin# I/O
30
TUQ
TUO
312
TUQ
TUO
32
TUQ
TUI
33
TUQ
TUI
Table 10: 68-lead Flat Pack Pin Descriptions
Name
Active
Description
P1.5
--- Port 1 Pin 5. A quasi-bidirectional port pin that is read and writ-
ten at location 0Fh of HWindow 0.
BREQ
Setting WSR.7 = 0 enables the P1.5 function of pin 30.
Low Bus Request. The BREQ output signal asserts during a HOLD
cycle when the internal bus controller has a pending external
memory cycle.
During a HOLD cycle, BREQ will not be asserted until the
HLDA signal is asserted. Once asserted, BREQ does not deas-
sert until the HOLD signal is released.
Setting WSR.7 = 1 enables the BREQ function of pin 30.
P1.6
--- Port 1 Pin 6. A quasi-bidirectional port pin that is read and writ-
ten at location 0Fh of HWindow 0.
HLDA
Setting WSR.7 = 0 enables the P1.6 function of pin 31.
Low Bus Hold Acknowledge. The UT80CRH198KD asserts the
HLDA signal as a result of another device activating the HOLD
signal. By asserting this signal, the UT80CRH196KDS is indi-
cating that it has released the bus.
Setting WSR.7 = 1 enables the HLDA function of pin 31.
P1.7
--- Port 1 Pin 7. A quasi-bidirectional port pin that is read and writ-
ten at location 0Fh of HWindow 0.
HOLD
Setting WSR.7 = 0 enables the P1.7 function of pin 32.
Low Bus Hold. The HOLD signal is used to request control of the
bus by another DMA device.
Setting WSR.7 = 1 enables the HOLD function of pin 32.
P2.6
--- Port 2 Pin 6. A quasi-bidirectional port pin that is read and writ-
ten at location 10h of HWindow 0.
T2UP-DN
Setting IOC2.1 = 0 enables the P2.6 function of pin 33.
--- Timer 2 Up or Down. The T2UP-DN pin will dynamically
change the direction that Timer 2 counts.
T2UP-DN = 1 then Timer 2 counts down.
T2UP-DN = 0 then Timer 2 counts up.
Setting IOC2.1 = 1 enables the T2UP-DN function of pin 33.
When IOC2.1 = 0, Timer 2 will only count up.
18
|
|
Share Link: 