Pin Multiplex - Toshiba TMPR4937 Manual

3.3

Pin multiplex

The TX4937 has some multiplexed pins. Each pin is used for different functions depending on the settings
of the ADDR[18]/[9] boot configuration signal. Table 3.3.1 shows how to set the function for each pin.
Setting of Boot config. signal
(Note1) (Note2)
Function of Each signal
(Note3) (Note4)
Note 1: * shows that there is no relationship to the configuration of the corresponding function.
Note 2: One of ECC, PIO[15:8] can be selected (can't use simultaneously).
(Operation is not guaranteed when these functions that cannot be used simultaneously are set up)
Note 3: It shows that these terminals are multiplexed under each function.
Note 4: Blank shows that the terminal isn't multiplexed with the function.
For example, when only ACLC are selected, functions other than DMAREQ[2], DMAACK[2],
PIO[4], PIO[3], PIO[2] can be used.
Table 3.3.1 Pin multiplex
Function on pin-multiplex
Signal
ECC PIO[15:8]
ADDR[18] H
ADDR[9] *
CB[7] CB[7]
CB[6] CB[6]
CB[5] CB[5]
CB[4] CB[4]
CB[3] CB[3]
CB[2] CB[2]
CB[1] CB[1]
CB[0] CB[0]
DMAREQ[3]
DMAACK[3]
DMAREQ[2]
DMAACK[2]
DMAREQ[1]
DMAACK[1]
DMAREQ[0]
DMAACK[0]
PIO[7]
PIO[6]
PIO[5]
PIO[4]
PIO[3]
PIO[2]
3-14
Chapter 3 Signals
ACLC
L *
* H
PIO[15]
PIO[14]
PIO[13]
PIO[12]
PIO[11]
PIO[10]
PIO[9]
PIO[8]
ACRESET*
SYNC
SDOUT
SDIN[0]
BITCLK