18
7521
7521
N/B MAINTENANCE
N/B MAINTENANCE
Keyboard controller
- Controls a matrix-scan keyboard by providing a keyboard scan function with wake-up
- Interrupts and sense ports
A/D converter
- 10-bit resolution
- 8 channels : single or scan mode (selectable )
D/A converter
- 8-bit resolution
- 2 channels
Interrupts
- nine external interrupt lines : NMI# , IRQ0 to 7#
- 26 on-chip interrupt sources
Power-down modes
- Sleep mode
- Software standby mode
- Hardware standby mode
A single chip microcomputer
On-chip flash memory
Maximum 64-kbyte address space
Support three PS/2 port for external keyboard ,mouse and internal track pad.
Support SMI,SCI trigger input:
Cover switch
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