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EMC

EM78P267A Datasheet Preview

EM78P267A Datasheet

8-BIT MICRO-CONTROLLER

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DESCRIPTION
EM78P267/467A/B/C
8-BIT MICRO-CONTROLLER FOR CONSUMER PRODUCT
Preliminary
The EM78P267/467A/B/C is an 8-bit microprocessor with low-power, high speed CMOS technology. There
are 4Kx13 bits Electical One Time Programmable Read Only Memory (OTP-ROM) within it. It provides 1
Protect bit and 6 One-time Programmable Option bits to protect the OTP memory code from any external access
as well as the user's options.
The OTP ROM will be incorporated into EM78P267/467A/B/C 8-bit microcontroller instead of it's original
memory. The user's development program can be easily programmed into or verify from this OTP memory by
using EMC OTP PROGRAMMER.
FEATURES
• Operating voltage range: 2.5V~5.5V
• Available in temperature range: 0°C~70°C
• Operating frequency range:
Crystal Type: DC~20MHz at 5V
DC~8MHz at 3V
RC Type:
DC~4MHz at 5V
DC~4MHz at 3V
• 2Kx13 on chip ROM (EM78267A/B/C)
• 4Kx13 on chip ROM (EM78467A/B/C)
• 9 special function registers
• 148x8 general purpose registers (SRAM)
• 3 bi-directional tri-state I/O ports (20 I/O pins for EM78P267/467A) (24 I/O pins for EM78P267/467B)
(22 I/O pins for EM78P267/467C)
• 5 level stack for subroutine nesting
• 8-bit real time clock/counter (TCC) with selective signal sources and trigger edges, and with overflow interrupt
• Selectable oscillator options:
XTAL1 type (High frequency)
XTAL2 type (32.768KHz)
RC type
External clock input
• Two oscillator periods per instruction cycle
• Power down mode
• Programmable wake up from sleep circuit on I/O ports
• Programmable free running on-chip watchdog timer
• Ten pull-up and wake-up pins
• Two open-drain pins
• Two R-option pins
• Interrupt function available
• 28 pin DIP, SOIC, SSOP
(EM78P267/467A)
28 pin SOIC
(EM78P267/467C)
* This specification are subject to be changed without notice.
9.5.1997 1




EMC

EM78P267A Datasheet Preview

EM78P267A Datasheet

8-BIT MICRO-CONTROLLER

No Preview Available !

32 pin DIP, SOIC
EM78P267/467A/B/C
8-BIT MICRO-CONTROLLER FOR CONSUMER PRODUCT
Preliminary
(EM78P267/467B)
• Function compatible with EM78267/467 except OTP memory inside
PIN ASSIGNMENTS
EM78P267A
EM78P467A
TCC
VDD
NC
VSS
/INT
P50
P51
P52
P53
P60
P61
P62
P63
P64
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 /RESET
27 OSCI
26 OSCO
25 P77
24 P76
23 P75
22 P74
21 P73
20 P72
19 P71
18 P70
17 P67
16 P66
15 P65
DIP, SOIC
EM78P267A
EM78P467A
VSS
TCC
VDD
VDD
P50
P51
P52
P53
P60
P61
P62
P63
P64
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 /RESET
27 OSCI
26 OSCO
25 P77
24 P76
23 P75
22 P74
21 P73
20 P72
19 P71
18 P70
17 P67
16 P66
15 P65
SSOP
EM78P267B
EM78P467B
P55
P54
TCC
VDD
NC
VSS
/INT
P50
P51
P52
P53
P60
P61
P62
P63
P64
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32 P56
31 P57
30 /RESET
29 OSCI
28 OSCO
27 P77
26 P76
25 P75
24 P74
23 P73
22 P72
21 P71
20 P70
19 P67
18 P66
17 P65
DIP, SOIC
EM78P267C
EM78P467C
P55
P54
TCC
VDD
VSS
P50
P51
P52
P53
P60
P61
P62
P63
P64
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 /RESET
27 OSCI
26 OSCO
25 P77
24 P76
23 P75
22 P74
21 P73
20 P72
19 P71
18 P70
17 P67
16 P66
15 P65
SOIC
FUNCTIONAL BLOCK DIAGRAM
OSCI OSCO /RESET
TCC /INT
Oscillator/Timing
Control
WDT Timer
Control of
sleep and
wake-up
on I/O ports
R1(TCC)
WDT Timeout
Prescaler
RAM
R4
Interrupt
Controller
ROM
Instruction
register
Instruction
Decoder
R2 Stack
ALU
R3 ACC
P70 ~ P77
DATA & CONTROL BUS
IOC7
R7
I/O
PORT
7
Fig. 2 Functional block diagram
* This specification are subject to be changed without notice.
IOC5
R5
I/O
PORT
5
IOC6
R6
I/O
PORT
6
P50 ~ P57
P60 ~ P67
9.5.1997 2


Part Number EM78P267A
Description 8-BIT MICRO-CONTROLLER
Maker EMC
Total Page 20 Pages
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