EM78P153E
OTP ROM
This specification is subject to change without prior notice.
2002/03/01
1
1. GENERAL DESCRIPTION
EM78P153E is an 8-bit microprocessor with low-power and high-speed CMOS technology. It is equipped
with a 512*13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides a
PROTECTION bit to prevent intrusion of user's code in the OTP memory as well as 15 OPTION bits to
match user's requirements.
With its OTP-ROM feature, the EM78P153E offers users a convenient way of developing and verifying
their programs. Moreover, user developed code can be easily programmed with the EMC writer.
EM78P153E
OTP ROM
This specification is subject to change without prior notice.
2002/03/01
2
2. FEATURES
14-lead packages : EM78P153E
Operating voltage range : 2.3V~5.5V
Available in temperature range: 0
C~70
C
Operating frequency rang (base on 2 clocks ):
* Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V, DC~4MHz at 2.3V.
* ERC mode: DC~4MHz at 5V, DC~4MHz at 3V, DC~4MHz at 2.3V.
Low power consumption:
* less then 1.5mA at 5V/4MHz
* typical of 15
A, at 3V/32KHz
* typical of 1
A, during the sleep mode
512
13 bits on chip ROM
Three built-in calibrated IRC oscillators
Programmable prescaler of oscillator set-up time
On-board bit by bit programming
One security register to prevent the code in the OTP memory from intruding
One configuration register to match the user's requirements
32
8 bits on chip registers (SRAM, general purpose register)
2 bi-directional I/O ports
5 level stacks for subroutine nesting
8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
Power down mode (SLEEP mode)
Three available interruptions
* TCC overflow interrupt
* Input-port status changed interrupt (wake up from the sleep mode)
* External interrupt
Programmable free running watchdog timer
7 programmable pull-high I/O pins
7 programmable open-drain I/O pins
6 programmable pull-down I/O pins
Two clocks per instruction cycle
99.9% single instruction cycle commands
EM78P153E
OTP ROM
This specification is subject to change without prior notice.
2002/03/01
3
Package types:
* 14 pin DIP 300mil: EM78P153EP
* 14 pin SOP 150mil: EM78P153EN
The transient point of system frequency between HXT and LXT is around 400KHz.
EM78P153E
OTP ROM
This specification is subject to change without prior notice.
2002/03/01
4
3. PIN ASSIGNMENTS
1
2
3
4
5
8
9
1
0
EM78P153E
6
7
11
12
13
14
P 5 0
P 6 7
P 6 6
V d d
P65/OSCI
P64/OSCO
P63//RST
P51
P52
P53
Vss
P60//INT
P61
P62/TCC
Fig. 1 Pin Assignment
Table 1 Pin Description
Symbol Pin No. Type
Function
Vdd
4
-
Power supply.
P65/OSCI
5
I/O
* General purpose I/O pin.
* External clock signal input.
* Input pin of XT oscillator.
* Pull_high/open-drain
* Wake up from sleep mode when the status of the pin changes.
P64/OSCO
6
I/O
* General purpose I/O pin.
* External clock signal input.
* Input pin of XT oscillator.
* Pull_high/open-drain
* Wake up from sleep mode when the status of the pin changes.
P63/RESET
7
I
* If set as /RESET and remain at logic low, the device will be under reset.
* If P63 is set and kept at logic "high," the oscillator will oscillate.
* If kept at logic low, it cannot oscillate.
* Wake up from sleep mode when the status of the pin changes.
* Voltage on /RESET must not exceed Vdd during the normal mode.
* Pull_high is on if defined as /RESET.
* P63 is input pin only
P62/TCC
8
I/O
* General purpose I/O pin.
* Pull_high/open_drain/pull_down.
* Wake up from sleep mode when the status of the pin changes.
* External Timer/Counter input.
P61
9
I/O
* General purpose I/O pin.
* Pull_high/open_drain/pull_down.
* Wake up from sleep mode when the status of the pin changes.
* Schmitt Trigger input during programming mode
P60//INT
10
I/O
* General purpose I/O pin.
* Pull_high/open_drain/pull_down.
EM78P153E
OTP ROM
This specification is subject to change without prior notice.
2002/03/01
5
* Wake up from sleep mode when the status of the pin changes.
* Schmitt Trigger input during the programming mode.
* External interrupt pin triggered by falling edge.
P66, P67
2, 3
I/O
* General purpose I/O pin.
* Pull-high/open-drain.
* Wake up from sleep mode when the status of the pin changes.
P50~P52
1,14,13
I/O
* General purpose I/O pin.
* Pull-down
P53
12
I/O
* General purpose I/O pin.
VSS
11
-
* Ground.
PDF 
ZIP