HTG1390 データシートの表示（PDF） - Holtek Semiconductor

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HTG1390

4-bit Microcontroller

Holtek Semiconductor 

Preliminary

HTG1390

Mask options

The following either/or options are available by

mask option which the user must select prior to

manufacture.

• 4-bit input ports PP and PS with or without

pull high resistors

• Each bit of PP and PS can wake up the proc-

essor from a HALT state

• Output Port PA to be CMOS or open drain

NMOS

• 8-bit programmable timer with external clock

or internal frequency source. Thirteen inter-

nal frequency sources are available to provide

an internal clock. Note that a value of n=6

cannot be used for the devices.

• Six kinds of sound clock frequency:

fSYS/2m, m=0, 1, 2, 3, 4, 5

Application Circuits

R*: Depends on the required system clock frequency. (R=36kΩ~2MΩ, at VDD=1.5V)

12

17th Nov ’98

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