TMP47C101 datasheet(12/32 Pages) TOSHIBA

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TOSHIBA CORPORATION

TMP47C101/201

(4)

General ﬂag (GF)

This is a 1-bit general-purpose ﬂag which can be set,

cleared, or tested by program.

Example:

When the following instruction are exe-

cuted with the accumulator, H register, L

carry ﬂag being set to “CH”, “0”, “7”, “5”,

and “1” respectively, the contents of the

accumulator and ﬂags become as follows:

2.7. System Controller

Figure 2-14. Clock Generator and Timing Generator

2.7.1 Clock Generator

The clock generator provides the basic clock pulse (CP) by

which the system clock to be supplied to the CPU and the

peripheral hardware is produced. The CP can be easily

obtained by connecting the resonator to the XIN and XOUT

pins. (RC oscillation is also possible, depending on the mask

option) The clock from the external oscillator is also available.

In the hold operating mode, the clock generator stops oscillat-

ing.

Figure 2-15. Examples of Oscillator Connection

Note: Accurate adjustment of the oscillation frequency.

Although the hardware to externally and directly monitor the CP is

not provided, the oscillation frequency can be adjusted by making

the program to output the pulse with a ﬁxed frequency to the port

with the all interrupts disabled and timer/counters stopped and mon-

itoring this pulse. With a system requiring the oscillation frequency

adjustment the adjusting program must be created beforehand.

Example: To output the oscillation frequency adjusting moni-

tor pulse to port R40.

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