OM5202 Datasheet PDF - NXP Semiconductors
| Part Number | OM5202 | |
| Description | ROMless 8-bit microcontroller | |
| Manufacturers | NXP Semiconductors | |
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Philips Semiconductors
ROMless 8-bit microcontroller
Product specification
OM5202
DESCRIPTION
The OM5202 8-Bit ROMless Microcontroller is manufactured in an
advanced CMOS process and is a derivative of the 80C51
microcontroller family. The OM5202 has the same instruction set as
the 80C51.
See also:
– OM5232 — 8K bytes mask programmable ROM
– OM5234 — 16k bytes mask programmable ROM
– OM5238 — 32K bytes mask programmable ROM
This device provides architectural enhancements that make it
applicable in a variety of applications for general control systems.
The OM5202 contains no read-only program memory, a volatile
256 × 8 read/write data memory, four 8-bit I/O ports, two 16-bit
timer/event counters (identical to the timers of the 80C51), a
multi-source, two-priority-level, nested interrupt structure, UART and
on-chip oscillator and timing circuits. The OM5202 can be expanded
with standard TTL compatible memories and logic.
The device also functions as an arithmetic processor having
facilities for both binary and BCD arithmetic plus bit-handling
capabilities. The instruction set consists of over 100 instructions: 49
one-byte, 45 two-byte and 17 three-byte. With a 16MHz crystal, 58%
of the instructions are executed in 0.75µs and 40% in 1.5µs. Multiply
and divide instructions require 3µs.
FEATURES
• 80C51 central processing unit
• no internal ROM, externally up to 64k bytes
• 256 × 8 RAM, expandable externally to 64k bytes
• Two standard 16-bit timer/counters
• Four 8-bit I/O ports
• Two open drain I/O’s (P1.6, P1.7)
• Full-duplex UART facilities
• Power control modes
– Idle mode
– Power-down mode
• Operating frequency range: 1.2 to 16 MHz
• Operating ambient temperature range: 0 to +70°C
PIN CONFIGURATIONS
P1.0 1
P1.1 2
P1.2 3
P1.3 4
P1.4 5
P1.5 6
P1.6 7
P1.7 8
RST 9
RxD/P3.0 10
TxD/P3.1 11
INT0/P3.2 12
INT1/P3.3 13
T0/P3.4 14
T1/P3.5 15
WR/P3.6 16
RD/P3.7 17
XTAL2 18
XTAL1 19
VSS 20
44
40 VDD
39 P0.0/AD0
38 P0.1/AD1
37 P0.2/AD2
36 P0.3/AD3
35 P0.4/AD4
34 P0.5/AD5
33 P0.6/AD6
32 P0.7/AD7
DIP 31 EA
30 ALE
29 PSEN
28 P2.7/A15
27 P2.6/A14
26 P2.5/A13
25 P2.4/A12
24 P2.3/A11
23 P2.2/A10
22 P2.1/A9
21 P2.0/A8
34
1 33
QFP
(SOT307–2)
11 23
12 22
SEE PAGE 2 FOR QFP PIN FUNCTIONS.
PART NUMBER SELECTION
PHILIPS PART
ORDER NUMBER
PART MARKING
PACKAGE NUMBER
OM5202/FBP
SOT129
OM5202/FBB
SOT307–2
TEMPERATURE RANGE °C,
PACKAGE
0 to +70, Plastic Dual In–line Package, 40 leads
0 to +70, Plastic Quad Flat Pack, 44 leads
EQUIVALENT TYPES
Details are as specified by the data sheet for the equivalent type:
OM5202 = P80C652 without I2C function.
OM5232 = P83C652 without I2C function.
OM5234 = P83C654 without I2C function.
OM5238 = P83C528 without I2C function.
December 1994
1
FREQUENCY
MHz
1.2 to 16
1.2 to 16
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Philips Semiconductors
ROMless 8-bit microcontroller
Product specification
OM5202
ROM CODE EXTERNAL (OM5202)
The MOVC instructions are the only instructions that have access to
program code in the external program memory. The EA input is
latched during RESET.
OSCILLATOR CHARACTERISTICS
XTAL1 and XTAL2 are the input and output, respectively, of an
inverting amplifier. The pins can be configured for use as an on-chip
oscillator, as shown in the Logic Symbol, page 2.
To drive the device from an external clock source, XTAL1 should be
driven while XTAL2 is left unconnected. There are no requirements
on the duty cycle of the external clock signal, because the input to
the internal clock circuitry is through a divide-by-two flip-flop.
However, minimum and maximum high and low times specified in
the data sheet must be observed.
Reset
A reset is accomplished by holding the RST pin high for at least two
machine cycles (24 oscillator periods), while the oscillator is running.
To insure a good power-on reset, the RST pin must be high long
enough to allow the oscillator time to start up (normally a few
milliseconds) plus two machine cycles. At power-on, the voltage on
VDD and RST must come up at the same time for a proper start-up.
Idle Mode
In the idle mode, the CPU puts itself to sleep while all of the on-chip
peripherals stay active. The instruction to invoke the idle mode is the
last instruction executed in the normal operating mode before the
idle mode is activated. The CPU contents, the on-chip RAM, and all
of the special function registers remain intact during this mode. The
idle mode can be terminated either by any enabled interrupt (at
which time the process is picked up at the interrupt service routine
and continued), or by a hardware reset which starts the processor in
the same manner as a power-on reset.
Power-Down Mode
In the power-down mode, the oscillator is stopped and the
instruction to invoke power-down is the last instruction executed.
Only the contents of the on-chip RAM are preserved. A hardware
reset is the only way to terminate the power-down mode. The control
bits for the reduced power modes are in the special function register
PCON. Table 2 shows the state of the I/O ports during low current
operating modes.
Table 2. External Pin Status During Idle and Power-Down Mode
MODE
PROGRAM
MEMORY
ALE
PSEN
PORT 0
Idle External 1 1 Float
Power-down
External 0 0 Float
PORT 1
Data
Data
PORT 2
Address
Data
Serial Control Register (S1CON) – See Table 3
S1CON (D8H) CR2 ENS1 STA STO SI AA CR1 CR0
Bits CR0, CR1 and CR2 determine the serial clock frequency that is generated in the master mode of operation.
PORT 3
Data
Data
Table 3.
CR2
0
0
0
0
1
1
1
1
Serial Clock Rates
CR1
0
0
1
1
0
0
1
1
CR0
0
1
0
1
0
1
0
1
BIT FREQUENCY (kHz) AT fOSC
6MHz
12MHz
16MHz
23
27
31.25
37
6.25
50
100
0.24 < 62.5
0 to 255
47
54
62.5
75
12.5
100
200
0.49 < 62.5
0 to 254
62.5
71
83.3
100
17
133
267
0.65 < 55.6
0 to 253
fOSC DIVIDED BY
256
224
192
160
960
120
60
96 × (256 – (reload value Timer 1))
reload value range Timer 1 (in mode 2)
December 1994
5
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for OM5202 electronic component. |
| Information | Total 11 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ OM5202.PDF Datasheet ] | |
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