1 port 1 (p10 to p17) – Toshiba H1 SERIES TLCS-900 User Manual
Page 54
TMP92CM22
2007-02-16
92CM22-52
3.5.1
Port 1 (P10 to P17)
Port1 is an 8-bit general-purpose I/O port. Bits can be individually set as either
inputs or outputs by control register P1CR and function register P1FC.
In addition to functioning as a general-purpose I/O port, port1 can also function as a
data bus (D8 to D15).
After released reset, device set port1 to pins of follow function by combination of AM1
and AM0 pins.
AM1 AM0
Function Setting after Reset
0
0
Don’t use this setting
0
1
Data bus (D8 to D15)
1
0
Input port (P10 to P17)
1
1
Don’t use this setting
Figure 3.5.1 Port 1
Internal data bus
Direction control
(on bit basis)
Reset
P1CR write
Output latch
P1 write
S
A
Selector
B
P1 Read
External access (Data write)
Port 1
P10 to P17
(D8 to D15)
Function control
(on byte batch)
P1FC write
D8 to D15
External access (Data read)
Output buffer