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2. FEATURES
· CPU: 8-bit micro-controller is similar to the 8051 family.
- Flash EPROM type (E version) operating voltage:
uC: The uC operating voltage is from 2.4 to 5.5V. The ISP operating voltage is from 3.3 to 5.5V.
CID: The CID receiver operating voltage is from 3.0 to 5.5V.
· Dual-clock operation:
- Main oscillator: Connect with 4M/8MHz crystal, built-in RC oscillator for clock stable from main crystal wake up.
- Sub oscillator: connect with 32768Hz crystal.
- Main and sub oscillators are enabled/disabled by bit control individually.
· ROM:
- 64K bytes of in-system-programmable Flash EPROM for application program (APROM).
- 4K bytes of auxiliary Flash EPROM for loader program (LDROM).
- 64K bytes external program memories address space.
· RAM:
- 256 bytes on chip scratch pad RAM.
- 4K bytes on chip RAM for MOVX instruction.
- 64K bytes external data memories address space.
· CID
- Compatible with Bellcore TR-NWT-000030 & SR-TSV-002476, British Telecom (BT)
SIN227, U.K. Cable Communication Association (CCA) specification.
- FSK modulator/demodulator: for Bell 202 and ITU-T V.23 FSK with 1200-baud rate.
- CAS generator/detector: for dual tones of Bellcore CAS and BT Idle State and Loop State
Dual Tone Alert Signal (DTAS).
- DTMF generator/receiver; DTMF receiver can be programmed