tc9256afg TOSHIBA Semiconductor CORPORATION, tc9256afg Datasheet - Page 16

• Manufacturer Part Number: tc9256afg
• Description: Pll For Dts
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2. General-Purpose I/O Ports (I/O-5 to I/O-9)
configured for CMOS input and output.
I/O-9 are latched in the internal register at the ninth falling edge of the serial clock signal. The data can
then be read as serial data I5 to I9 from the DATA pins.
general-purpose I/O port pins I/O-5 to I/O-9.
(1)
(3) Output register ......................... The data set in bits O1 to O4 of the input register can be read as serial
Pins I/O-5 to I/O-9 are general-purpose I/O ports used for control signal input and output. They are
These I/O ports are set for input or output using bits C5, C6 and M7 to M9 of the input register (D2H).
Setting bits C5, C6 and M7 to M9 to “0” sets these ports for input. Data input in parallel from I/O-5to
Setting bits C5, C6 and M7 to M9 to “1” sets these ports for output.
Data set in bits O5 to O9 of the input register (D2H) is output in parallel from their corresponding
These operations are valid when bits SC, IF1, IF2 and CLK are all set to “0”.
TC9257APG and TC9257AFG
•
Setting data for output ports
Note1:
Note2:
Note3:
On TC9257APG and TC9257AFG, pins I/O-7to I/O-9 also serve as general-purpose counter
input pins. Therefore, bits SC, IF1 and IF2 of the input register (D2H) must be set to “0” when
pins I/O-7to I/O-9 are used for I/O ports. Since pin I/O-5 also serves as the CLK pin, the CLK
bit of the input register (D2H) must be set to “0” when pin I/O-5 is used as an I/O port.
Bit names in parentheses “( )” apply to the TC9256APG and TC9256AFG.
Bits marked with (*1) cannot be set on the TC9256APG and TC9256AFG.
data O1 to O4 from the output register (D3H).
16
TC9256, 57APG/AFG
2006-07-14