6 port 8 (p80 to p87) – Toshiba H1 Series User Manual
Page 131
TMP92CZ26A
92CZ26A-128
3.7.6 Port 8 (P80 to P87)
Port 80 to 87 are 8-bit output ports. Resetting sets output latch of P82 to “0” and output
latches of P80 to P81, P83 to P87 to “1”. But if it is started at boot mode (AM [1:0]
= “11”),
output latch of P82 is set to “1”.
Port 8 also function as interface-pin for external memory.
Writing “1” in the corresponding bit of P8FC, P8FC2 enables the respective functions.
Resetting resets P8FC to “0” and P8FC2 to “0”, sets all bits to output ports.
Figure 3.7.12 Port 8
P80 (
0
CS )
P81 (
1
CS , SDCS )
P82 (
2
CS , CSZA , SDCS )
P83 (
3
CS , CSXA )
P84 ( CSZB)
P85 ( CSZC )
P86 ( CSZD ,
CE
0
ND
)
P87 ( CSXB ,
CE
1
ND
)
Function
control
Output latch
P8 read
Reset
0
CS ,
1
CS ,
2
CS ,
3
CS , CSZB , CSZC , CSZD , CSXB
Selector
P8FC write
P8 write
S
Function
control2
P8FC2 write
“1”, SDCS , CSZA , CSXA ,“1”, “1”, “1”, “1”
0
CS
,
SDCS
,
SDCS
,
CSXA
,
CSZB
,
CSZC
,
CE
0
ND
,
CE
1
ND
Internal dat
a
bus