Pioneer TS4 Service Manual page 57

External interrupts
Pin
Interrupt0-1
System services
Pin
ClockIn
SpeedSelect0-1
notRST
CPUAnalyse / TrigIn
CPUReset
1
ErrorOut / TrigOut
Err
1 This pin is tri-stated during reset and then sampled at the end of the reset to determine whether the OS-Link is active and to determine the
function of the shared CPUAnalyse / TrigIn and the ErrorOut / TrigOut. If the ErrorOut pin is sampled high (i.e at VDD) then the DCU
signals (TrigIn and TrigOut) are selected and a low value indicates OS-Link signals (i.e. CPUAnalyse, ErrorOut) are to be used.
External memory interface
Pin
MemAddr2-23
MemData0-31
MemRdnotWr
MemReq
MemGrant
MemWait
notMemCAS0-3
notMemRAS0-3
notMemCSROM
notMemOE
notMemBE0-3
notMemCS2
BootSource0-1
ProcClockOut
In/Out Function
in Interrupt.
In/Out Function
in
System input clock - PLL or TimesOneMode.
in
PLL speed selector.
in
System reset.
in
Error analysis / External trigger input to DCU.
in
Soft reset for analyzing from OS-Link.
in/out, out
Error indicator / Signal to trigger external debug circuitry (e.g. LSA).
In/Out Function
out Address bus.
Data bus. MemData0 is the least significant bit (LSB) and MemData31 is
in/out
the most significant bit (MSB).
out
ReadnotWrite strobe.
in
Direct memory access request.
out
Direct memory access granted.
in
Memory cycle extender.
out
CAS strobes - bytes 0-3 or banks 0,1.
out
RAS strobes - banks 0,1.
out
Chip select strobe for ROM in bank3.
out
Output enable strobe - banks 0-3.
out
Byte enable strobes - banks 0-3.
out
Chip select strobe for memory in bank 2.
in
Boot from ROM or from link.
out
Processor clock.
TS4
57