em78p468l ELAN Microelectronics Corp, em78p468l Datasheet - Page 7

• Manufacturer Part Number: em78p468l
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

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Product Specification (V1.5) 02.15.2007
(This specification is subject to change without further notice)
CPU Configuration
• 4K×13 bits on-chip OTP-ROM
• 144 bytes general purpose register
• 128 bytes on-chip data RAM
• 272 bytes SRAM
• 8 level stacks for subroutine nesting
• Power-on voltage detector provided (2.0±0.1V) for
• Power-on voltage detector provided (1.7±0.1V) for
I/O Port Configuration
• Typically, 12 bi-directional tri-state I/O ports.
• 16 bi-directional tri-state I/O ports shared with LCD
• Up to 28 bi-directional tri-state I/O ports
Operating Voltage and Temperature Range:
• Commercial: 2.3V ~ 5.5 V. (at 0 ° C~+70 ° C)
• Industrial: 2.5V ~ 5.5 V. (at -40 ° C ~+85 ° C)
• Commercial: 2.1 V ~ 5.5 V. (at 0 ° C ~+70 ° C)
• Industrial: 2.3V ~ 5.5 V. (at -40 ° C ~+85 ° C)
Operating Mode:
• Normal mode: The CPU is operated on main
• Green mode: The CPU is operated on sub-oscillator
• Idle mode: CPU idle, LCD display remains working
• Sleep mode: The whole chip stops working
Oscillation Mode
• High frequency oscillator can select among Crystal,
• Low frequency oscillator can select between Crystal
EM78P468N
EM78P468L
General Description
Features
oscillator frequency (Fm)
frequency (Fs) and main oscillator (Fm) is stopped
♦ Operation speed: DC ~ 10MHz clock input
♦ Dual clock operation
The EM78P468N/L is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS
technology. Integrated onto a single chip are on chip Watchdog Timer (WDT), Data RAM, ROM, programmable real time
clock counter, internal/external interrupt, power down mode, LCD driver, infrared transmitter function, and tri-state I/O.
The series has an on-chip 4K×13-bit Electrical One Time Programmable Read Only Memory (OTP-ROM).
EM78P468L provides multi-protection bits to prevent intrusion of user’s OTP memory code. Seven Code option bits are
available to meet user’s requirements. Special 13 bits customer ID options are provided as well.
With its enhanced OTP-ROM feature, the EM78P468N/L provides a convenient way of developing and verifying user’s
programs. Moreover, this OTP device offers the advantages of easy and effective program updates, using development
and programming tools. User can avail of the ELAN Writer to easily program his development code.
EM78P468N
EM78P468L
segment output pin.
♦ Input port wake-up function (Port 6, Port 8).
RC, or PLL (phase lock loop)
or RC mode
Works on Idle and Sleep mode.
Peripheral Configuration
Eight Interrupt Sources: Three External and Five Internal
LCD Circuit
Package Type:
• 8-bit real time clock/counter (TCC)
• One infrared transmitter / PWM generator function
• Four sets of 8 bits auto reload down-count timer can be
• Internal interrupt source: TCC; Counters 1, 2;
• External interrupt source : INT0, INT1 and Pin change
• Common driver pins: 4
• Segment driver pins: 32
• LCD Bias: 1/3, 1/2 bias
• LCD Duty: 1/4, 1/3, 1/2 duty
• Dice form: 59 pins
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• LQFP-64 pin: EM78P468NAQxS/xJ
• LQFP-44 pin: EM78P468NBQxS/xJ
• QFP-44 pin: EM78P468NCQxS/xJ
Note: Green products do not contain hazardous
used as interrupt sources
♦ Counter 1: independent down-count timer
♦ Counter 2, High Pulse Width Timer (HPWT), and
♦ Programmable free running on chip watchdog timer
High/Low pulse width timer.
wake-up (Port 6 and Port 8)
QFP-64 pin: EM78P468NQxS/xJ
substances
Low Pulse Width Timer (LPWT) shared with IR
function.
(WDT). This function can operate on Normal, Green
and Idle mode.
(Body 14mm × 20mm)
(Body 7mm × 7mm)
(Body 10mm × 10mm)
(Body 10mm × 10mm)
EM78P468N/EM78P468L
8-Bit Microcontroller
The
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