EM78P312N
8-Bit Microcontroller
1
General Description
The EM78P312N is an 8-bit microprocessor with low-power, high-speed CMOS technology and
high noise immunity.
It
has an on-chip 4K×13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides
multi-protection bits
to prevent intrusion of user’s OTP memory codes. Seven Option bits are also available to meet
user’s requirements. With its OTP-ROM feature, the EM78P312N 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.
2
Features
CPU configuration
4K×13 bits on-chip ROM
144×8 bits on-chip registers (SRAM)
8-level stacks for subroutine nesting
Less than 3.5mA at 5V/8MHz
Typically 0.8
μA,
during sleep mode
Typically 1.1
μA,
during idle mode
I/O port configuration
4 bidirectional I/O ports : P6, P7, P8, P9
22 I/O pins
10 Programmable pull-down I/O pins
10 programmable pull-high I/O pins
External interrupt : P60, P61, P73, P80
Operating voltage range:
OTP version
Operating voltage range:2.5v~5.5v
Operating temperature range:
-40~85°C
Operating frequency range:
Main clock
8 bits Timer/Counter
TCC: 8-bit real time clock/counter with overflow
interrupt
TC3: Timer/Counter/Capture
TC4: Timer/Counter/ PWM (pulse width modulation) /
PDO (Programmable divider output)
8-bit channels Analog-to-Digital Converter with 10-bit
resolution
Time Base Timer:(1Hz~16kHz at 8MHz)
Key tone output:(1kHz~8kHz at 8MHz)
8-bit channels Analog-to-Digital Converter with 10-bit
resolution
Fifteen available interrupts:
WDT time-out interrupt
TCC overflow interrupt
Time base timer interrupt (the first falling edge of the
source clock)
Serial UART transmit interrupt
Serial UART receive interrupt
Serial UART receive error interrupt
Four External interrupt
ADC completion interrupt
TC2 overflow interrupt
TC3 overflow interrupt
TC4 overflow interrupt
Serial SPI interrupt
Special features
Programmable free running watchdog timer
Two clocks per instruction cycle
Power-on Reset
High noise immunity
Power saving Sleep mode
Selectable Oscillation mode
Package type:
28-pin DIP 600 mil: EM78P312NP
28-pin Skinny DIP 300 mil: EM78P312NAK
28-pin Skinny DIP 400 mil: EM78P312N
28-pin SOP 300 mil: EM78P312NM
28-pin SSOP 209 mil: EM78P312NS
•
Crystal mode:
•
ERC mode:
DC ~ 20MHz/2clks @ 5V; DC ~100ns inst. cycle @ 5V
DC ~ 8MHz/2clks @ 3V;DC ~ 250ns inst. cycle @ 3V
DC ~ 16MHz/2clks @ 5V;DC ~ 125ns inst. cycle @ 5V
DC ~ 8MHz/2clks @ 3V;DC ~ 250ns inst. cycle @ 3V
Peripheral configuration
Serial peripheral interface (SPI) available
Universal asynchronous receiver transmitter interface
(UART)available
16 bits Counter/Timer
TC2: Timer/Counter/Window
3
Pin Assignment
(ACLK)
OSCO
OSCI
TEST
(AD0) P90
(AD1) P91
(AD2) P92
(AD3) P93
(AD4) P94
(AD5) P95
(AD6) P96
(AD7/VREF) P97
(TC3, INT3) P80
(TC4, /PWM, /PDO) P81
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VDD
/RESET
(VPP)
P67
(DINCK)
P66
(DATAIN)
P65
(PGMB)
P64 (/SS)(OEB)
P63 (/TONE)
P62 (TC2)
P61 (INT1)
P60 (/INT0)
P73 (/SLEEP, /INT5)
P72 (TX,SO)
P71(RX,SI)
P70 (/SCK)
EM78P312N
Fig. 3- Pin Assignment
Product Specification (V1.0) 10.03.2006
(This specification is subject to change without further notice)
•
1
EMC [ ELAN MICROELECTRONICS CORP ]
