GMS36 Datasheet, PDF (86/109 Pages) Hynix Semiconductor – 4-BIT SINGLE CHIP MICROCOMPUTERS

Chapter 8. GMS37XXXT
CHAPTER 8. GMS37XXXT
Description
The GMS37XXXT series are remote control transmitter which uses CMOS
technology and the EPROM version.
This enables transmission code outputs of different configurations, multiple
custom code output, and double push key output for easy fabrication.
The GMS37XXXT series are suitable for remote control of TV, VCR, FANS, Air-
conditioners, Audio Equipment, Toys, Games etc.
It is possible to structure the 8 x 7 key matrix for GMS37112T, and the 4 x 7 key
matrix for GMS37004T.
Features
• Program memory
: 1,024 bytes for GMS37004T/112T/140T
Ø • Data memory : 32 4 bits
• 43 types of instruction set
• 3 levels of subroutine nesting
• Operating frequency : 300kHz ~ 1MHz at kHz version
2.4MHz ~ 4MHz at MHz version
• Instruction cycle :
f_OSC/6 at kHz version
f_OSC/48 at MHz version
• CMOS process (Single 3.0V power supply)
• Stop mode (Through internal instruction)
• Released stop mode by key input
• Built in Power-on Reset circuit
• Built in Low Voltage Detection circuit
• Built in capacitor for ceramic oscillation circuit at kHz version
• Built in a watch dog timer (WDT)
• Low operating voltage : 2.2 ~ 3.6V (at 300kHz ~ 4MHz)
Table 8-1 GMS37XXXT series members
Series
Program memory
Data memory
I/O ports
Input ports
Output ports
Package
GMS37004T
1,024
32 Ø 4
-
4
7 (D0~D6)
16DIP/SOP
GMS37112T
1,024
32 Ø 4
4
4
7 (D0~D6)
20DIP/SOP/SSOP
GMS37140T
1,024
32 Ø 4
4
4
10 (D0~D9)
24Skinny DIP/SOP
8-1