tc9256afg TOSHIBA Semiconductor CORPORATION, tc9256afg Datasheet - Page 18

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

Note1:
Note2:
Note3:
Note4:
Note5:
•
counter.
A typical example of data setting for general-purpose counter and I/O port use is shown below.
As shown above, the pins can be switched as required to enable use as an I/O port or general-purpose
TC9257APG and TC9257AFG
Bit names in parentheses “( )” apply to the TC9256APG and TC9256AFG.
Data is “0” for bits marked with (*2) on the TC9256APG and TC9256AFG.
When pins I/O-5 to I/O-9 are used for output, the data in I5~I9 of the output register (D3H) is
undefined.
When power is turned on, input register (D2H) I/O port control bits C5, C6 and M7 to M9 and
output data bits O5 to O9 are set to “0”.
(General-purpose I/O ports are set as input ports. Pins used both as general-purpose I/O ports
and general-purpose counter input are set for I/O port input. The output state of general-purpose
output ports is set to high impedance (N-channel open drain output = off).
On TC9256APG and TC9256AFG, pins I/O-5 and I/O-6 also serve as general-purpose counter
input pins. Therefore, bits IF1 and IF2 of input register 2 must be set to “0” when these pins are
used as I/O ports.
Bits marked with (*1) cannot be set on the TC9256APG and TC9256AFG.
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TC9256, 57APG/AFG
2006-07-14