tmp19a44fda TOSHIBA Semiconductor CORPORATION, tmp19a44fda Datasheet - Page 162

• Manufacturer Part Number: tmp19a44fda
• Description: 32bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Input/Output Ports
7.5 Port 4 (P40 through P47)
The port 4 is a general-purpose, 8-bit input/output port. For this port, inputs and outputs can be specified in units
of bits by using the control register P4CR and the function register P4FC.
Besides the general-purpose input/output port function, the port 4 performs other functions: P40 through P43
output the chip select signal ( CS0 to CS3 ) and input the key-on wake-up, P44 functions as the SCOUT output
pin for outputting internal clocks, and P47 outputs a 16-bit timer. By making necessary settings during a reset,
P45 functions as a BUSMD pin for setting external bus modes, and P46 as an ENDIAN setting pin.
P4 read
(function control)
(function control)
(Output control)
(Output control)
(input control)
(output latch)
P4FC2
P4PUP
P4FC1
P4CR
P4IE
P4
Drive disabled during
STOP/ RESET
External bus
opening
CS0~CS3
0
1
Fig. 7.8 Port 4(P40 through P43)
External bus
opening
TMP19A44 (rev1.3) 7-14
0
1
0
1
0
1
KEY24~KEY27
PORT KEEP
0
1
0
1
TMP19A44
2010-04-01
Port 4
P40~P43
(CS0~CS3,
KEY24~27)
RESET