tmp19a43fzxbg TOSHIBA Semiconductor CORPORATION, tmp19a43fzxbg Datasheet - Page 81

• Manufacturer Part Number: tmp19a43fzxbg
• Description: 32bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

3.5.5
Port 4 (P40-P44)
or output. The control register P4CR and function register P4FC are used to set the port for input or
output. Bits P41 to P44 of the output latch register are set to 1 by a reset if RSTPUP is High or cleared to
0 if RSTPUP is Low. Bit P44 of the output latch register is set to 1 regardless of the value of RSTPUP.
All bits of P4CR and P4FC are cleared to 0 by a reset, with P40 to P43 placed in input mode with pull-up
resistors enabled (if RSTPUP is High) or disabled (if RSTPUP is Low). P44 is placed in input mode with
a pull-up resistor disabled regardless of the value of RSTPUP.
select signals (CS0-CS3), and P44 functions as the SCOUT pin, outputting the system clock.
Port 4 is a 5-bit general-purpose input/output port whose bits can each be set independently for input
In addition to functioning as a general-purpose input/output port, P40-P43 can also output the chip
Direction Control
Function Control
S
Write to P4CR
Write to P4FC
Output Latch
Write to P4
(bitwise)
(bitwise)
Reset
R
RSTPUP
Figure 0.12 Port 4 (P40-P43)
TMP1942CY/CZ-80
CS0 , CS1 , CS2 , CS3
A
B
S
Read P4
Output Latch
Reset
TMP1942CY/CZ
P-ch
STOP
DRIVE
Pull-up Resistor
Programmable
P40 ( CS0 )
P41 ( CS1)
P42 ( CS2 )
P43 ( CS3 )