TC9256, 57APG/AFG

2006-07-14

23

Other Control Bits

1.

CLK (O4C) and C5 (XT) Bits ................... Control bits that switch the function for the

I/O-5/CLK pin on the TC9257APG and

TC9257AFG, and the OT-4/DO2 pin on the

TC9256APG and TC9256AFG.

(1)

On the TC9257APG and TC9257AFG, the CLK bit controls switching of the I/O-5 pin and CLK pin.

• When bits R0 to R3 of the input register (D0H) are all set to “1” (standby mode)

• When one of bits R0 to R3 of the input register (D0H) is set to “0” (not standby mode)

Note1:

The system clock output marked with an asterisk “(*)” refers to output of the crystal oscillator

frequencies listed below.

Crystal Oscillator (MHz)

System Clock (kHz)

Duty (%)

10.8

7.2

3.6

600

4.5

750

50

Note2:

Bit names in parentheses “(

)” apply to the TC9256APG and TC9256AFG.