PHILIPS OM5232/FBP Cmos single-chip 8-bit microcontroller Datasheet

Philips Semiconductors
Product specification
CMOS single-chip 8-bit microcontroller
DESCRIPTION
OM5232
PIN CONFIGURATIONS
The OM5232 Single-Chip 8-Bit Microcontroller is manufactured in an
advanced CMOS process and is a derivative of the 80C51
microcontroller family. The OM5232 has the same instruction set as
the 80C51.
See also:
– OM5202 — ROMless version
– 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 OM5232 contains a non-volatile 8k × 8 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. For systems that
require extra capability, the OM5232 can be expanded using
standard TTL compatible memories and logic.
40 V
DD
P1.1 2
39 P0.0/AD0
P1.2 3
38 P0.1/AD1
P1.3 4
37 P0.2/AD2
P1.4 5
36 P0.3/AD3
P1.5 6
35 P0.4/AD4
P1.6 7
34 P0.5/AD5
P1.7 8
33 P0.6/AD6
RST 9
32 P0.7/AD7
DIP
RxD/P3.0 10
INT0/P3.2 12
29 PSEN
INT1/P3.3 13
28 P2.7/A15
T0/P3.4 14
27 P2.6/A14
T1/P3.5 15
26 P2.5/A13
WR/P3.6 16
25 P2.4/A12
RD/P3.7 17
24 P2.3/A11
XTAL2 18
23 P2.2/A10
XTAL1 19
22 P2.1/A9
VSS 20
21 P2.0/A8
FEATURES
• 80C51 central processing unit
• 8k × 8 ROM, expandable externally 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
31 EA
30 ALE
TxD/P3.1 11
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.
34
44
1
33
QFP
(SOT307–2)
11
– Idle mode
– Power-down mode
• ROM code protection
• Extended frequency range: 1.2 to 16 MHz
• Operating ambient temperature range: 0 to
P1.0 1
23
12
22
SEE PAGE 2 FOR QFP PIN FUNCTIONS.
+70°C
PART NUMBER SELECTION
PHILIPS PART
ORDER NUMBER
PART MARKING
OM5232/FBP/xxx 1)
PACKAGE NUMBER
SOT129
OM5232/FBB/xxx 1)
SOT307–2
NOTE:
1. xxx denotes the ROM code number.
TEMPERATURE RANGE °C,
PACKAGE
FREQUENCY
MHz
0 to +70, Plastic Dual In–line Package, 40 leads
1.2 to 16
0 to +70, Plastic Quad Flat Pack, 44 leads
1.2 to 16
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
Philips Semiconductors
Product specification
CMOS single-chip 8-bit microcontroller
OM5232
QFP PIN FUNCTIONS
LOGIC SYMBOL
34
33
XTAL1
XTAL2
EA
PSEN
QFP
(SOT307–2)
Pin
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Function
VSS1
NC
P2.0/A8
P2.1/A9
P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13
P2.6/A14
P2.7/A15
PSEN
ALE
VSS2
EA/VPP
P0.7/AD7
Pin
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Function
P0.6/AD6
P0.5/AD5
P0.4/AD4
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
VDD
VSS3
P1.0
P1.1
P1.2
P1.3
P1.4
PORT 1
RxD
TxD
INT0
INT1
T0
T1
WR
RD
NOTE:
1. Due to EMC improvements, all VSS pins (6, 16, 28, 39) must be
connected to VSS.
BLOCK DIAGRAM
FREQUENCY
REFERENCE
XTAL2
COUNTERS
XTAL1
OSCILLATOR
AND
TIMING
T0
PROGRAM
MEMORY
(8K x 8 ROM)
DATA
MEMORY
(256 x 8 RAM)
64K BYTE BUS
EXPANSION
CONTRTOL
PROGRAMMABLE I/O
T1
TWO 16-BIT
TIMER/EVENT
COUNTERS
CPU
INTERNAL
INTERRUPTS
INT0
INT1
CONTROL
PARALLEL PORTS,
ADDRESS/DATA BUS
AND I/O PINS
EXTERNAL
INTERRUPTS
December 1994
2
PROG SERIAL PORT
FULL DUPLEX UART
SYNCHRONOUS SHIFT
SERIAL IN
SERIAL OUT
SHARED WITH
PORT 3
PORT 2
Function
P1.5
P1.6
P1.7
RST
P3.0/RxD
VSS4
P3.1/TxD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6/WR
P3.7/RD
XTAL2
XTAL1
22
PORT 3
12
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
ALE
23
ALTERNATE
FUNCTIONS
11
PORT 0
RST
1
ADDRESS AND
DATA BUS
VDDVSS
ADDRESS BUS
44
Philips Semiconductors
Product specification
CMOS single-chip 8-bit microcontroller
OM5232
PIN DESCRIPTIONS
PIN NUMBER
MNEMONIC
DIP
QFP
TYPE
VSS
20
6, 16,
28, 39
I
Ground: 0V reference. With the QFP package all VSS pins (VSS1 to VSS4) must be connected.
Power Supply: This is the power supply voltage for normal, idle, and power-down operation.
VDD
NAME AND FUNCTION
40
38
I
39–32
37–30
I/O
Port 0: Port 0 is an open-drain, bidirectional I/O port. Port 0 pins that have 1s written to them
float and can be used as high-impedance inputs. Port 0 is also the multiplexed low-order address
and data bus during accesses to external program and data memory. In this application, it uses
strong internal pull-ups when emitting 1s.
1–6
40–44,
1
I/O
7
8
2
3
I/O
I/O
Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups, except P1.6 and P1.7 which
are open drain. Port 1 pins that have 1s written to them are pulled high by the internal pull-ups
and can be used as inputs. As inputs, port 1 pins that are externally pulled low will source current
because of the internal pull-ups. (See DC Electrical Characteristics: IIL). Alternate functions
include:
open drain output
open drain output
P2.0–P2.7
21–28
18–25
I/O
Port 2: Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, port
2 pins that are externally being pulled low will source current because of the internal pull-ups.
(See DC Electrical Characteristics: IIL). Port 2 emits the high-order address byte during fetches
from external program memory and during accesses to external data memory that use 16-bit
addresses (MOVX @DPTR). In this application, it uses strong internal pull-ups when emitting 1s.
During accesses to external data memory that use 8-bit addresses (MOV @Ri), port 2 emits the
contents of the P2 special function register.
P3.0–P3.7
10–17
5,
7–13
I/O
10
11
12
13
14
15
16
17
5
7
8
9
10
11
12
13
I
O
I
I
I
I
O
O
Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, port
3 pins that are externally being pulled low will source current because of the pull-ups. (See DC
Electrical Characteristics: IIL). Port 3 also serves the special features of the 80C51 family, as
listed below:
RxD (P3.0): Serial input port
TxD (P3.1): Serial output port
INT0 (P3.2): External interrupt
INT1 (P3.3): External interrupt
T0 (P3.4): Timer 0 external input
T1 (P3.5): Timer 1 external input
WR (P3.6): External data memory write strobe
RD (P3.7): External data memory read strobe
RST
9
4
I
ALE
30
27
I/O
Address Latch Enable: Output pulse for latching the low byte of the address during an access
to external memory. In normal operation, ALE is emitted at a constant rate of 1/6 the oscillator
frequency. Note that one ALE pulse is skipped during each access to external data memory.
PSEN
29
26
O
Program Store Enable: Read strobe to external program memory via Port 0 and Port 2. It is
activated twice each machine cycle during fetches from the external program memory. When
executing out of external program memory two activations of PSEN are skipped during each
access to external data memory. PSEN is not activated (remains HIGH) during no fetches from
external program memory. PSEN can sink/source 8 LSTTL inputs and can drive CMOS inputs
without external pull–ups.
EA
31
29
I
External Access: If during a RESET, EA is held at TTL, level HIGH, the CPU executes out of the
internal program memory ROM provided the Program Counter is less than 16384. If during a
RESET, EA is held a TTL LOW level, the CPU executes out of external program memory. EA is
not allowed to float.
XTAL1
19
15
I
Crystal 1: Input to the inverting oscillator amplifier and input to the internal clock generator
circuits.
XTAL2
18
14
O
Crystal 2: Output from the inverting oscillator amplifier.
P0.0–0.7
P1.0–P1.5
P1.6
P1.7
Reset: A high on this pin for two machine cycles while the oscillator is running, resets the device.
An internal diffused resistor to VSS permits a power-on reset using only an external capacitor to
VDD.
NOTE:
To avoid “latch-up” effect at power-on, the voltage on any pin at any time must not be higher than VDD + 0.5V or VSS – 0.5V, respectively.
December 1994
3
Philips Semiconductors
Product specification
CMOS single-chip 8-bit microcontroller
Table 1.
OM5232 Special Function Registers
SYMBOL
DESCRIPTION
DIRECT
BIT ADDRESS, SYMBOL, OR ALTERNATIVE PORT FUNCTION
ADDRESS MSB
LSB
RESET
VALUE
ACC*
Accumulator
E0H
E7
E6
E5
E4
E3
E2
E1
E0
00H
B*
B Register
F0H
F7
F6
F5
F4
F3
F2
F1
F0
00H
DPTR:
Data Pointer
(2 bytes)
Data Pointer High
Data Pointer Low
83H
82H
IE*#
Interrupt Enable
A8H
IP*#
Interrupt Priority
B8H
–
87
86
85
84
83
82
81
80
P0*
Port 0
80H
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
97
96
95
94
93
92
91
90
P1*#
Port 1
90H
SDA
SCL
A7
A6
A5
A4
A3
A2
A1
A0
P2*
Port 2
A0H
A15
A14
A13
A12
A11
A10
A9
A8
B7
B6
B5
B4
B3
B2
B1
B0
DPH
DPL
00H
00H
AF
AE
EA
BF
BE
AD
AC
AB
AA
A9
A8
ES1
ES0
ET1
EX1
ET0
EX0
BD
BC
BB
BA
B9
B8
PS1
PS0
PT1
PX1
PT0
PX0
0x000000B
xx000000B
FFH
FFH
FFH
P3*
Port 3
B0H
RD
WR
T1
T0
INT1
INT0
TXD
RXD
FFH
PCON
Power Control
87H
SMOD
–
–
–
GF1
GF0
PD
IDL
0xxx0000B
9F
9E
9D
9C
9B
9A
99
98
S0CON*#
Serial 0 Port Control
98H
SM0
SM1
SM2
REN
TB8
RB8
TI
RI
S0BUF#
Serial 0 Data Buffer
99H
D7
D6
D5
D4
D3
D2
D1
D0
CY
AC
F0
RS1
RS0
OV
F1
P
PSW*
00H
xxxxxxxxB
Program Status Word
D0H
reserved (Note 1)
DAH
00H
Stack Pointer
81H
07H
reserved (Note 1)
DBH
00H
reserved (Note 1)
D9H
F8H
reserved (Note 1)
D8H
00000000B
TCON*
Timer Control
88H
TH1
Timer High 1
8DH
00H
TH0
Timer High 0
8CH
00H
TL1
Timer Low 1
8BH
00H
TL0
Timer Low 0
8AH
00H
TMOD
Timer Mode
89H
SP
*
OM5232
8F
8E
8D
8C
8B
8A
89
88
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
GATE
C/T
M1
SFRs are bit addressable.
# SFRs are modified from or added to the 80C51 SFRs.
NOTE
1. Reserved for I2C; not supported in OM5232
December 1994
4
M0
GATE
C/T
M1
M0
00H
00H
00H
Philips Semiconductors
Product specification
CMOS single-chip 8-bit microcontroller
OM5232
ROM CODE PROTECTION
Reset
The OM5232 has an additional security feature. ROM code
protection may be selected by setting a mask–programmable
security bit (i.e., user dependent). This feature may be requested
during ROM code submission. When selected, the ROM code is
protected and cannot be read out at any time by any test mode or by
any instruction in the external program memory space.
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.
The MOVC instructions are the only instructions that have access to
program code in the internal or external program memory. The EA
input is latched during RESET and is “don’t care” after RESET
(also if the security bit is not set). This implementation prevents
reading internal program code by switching from external program
memory to internal program memory during a MOVC instruction or
any other instruction that uses immediate data.
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.
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.
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.
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.
Table 2.
External Pin Status During Idle and Power-Down Mode
PROGRAM
MEMORY
ALE
PSEN
PORT 0
PORT 1
PORT 2
PORT 3
Idle
Internal
1
1
Data
Data
Data
Data
Idle
External
1
1
Float
Data
Address
Data
Power-down
Internal
0
0
Data
Data
Data
Data
Power-down
External
0
0
Float
Data
Data
Data
MODE
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.
Table 3.
Serial Clock Rates
BIT FREQUENCY (kHz) AT fOSC
CR2
CR1
CR0
6MHz
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
23
27
31.25
37
6.25
50
100
0.24 < 62.5
0 to 255
December 1994
12MHz
16MHz
fOSC DIVIDED BY
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
256
224
192
160
960
120
60
5
96 × (256 – (reload value Timer 1))
reload value range Timer 1 (in mode 2)
Philips Semiconductors
Product specification
CMOS single-chip 8-bit microcontroller
OM5232
ABSOLUTE MAXIMUM RATINGS1, 2, 3
RATING
UNIT
Storage temperature range
–65 to +150
°C
Voltage on any other pin to VSS
–0.5 to + 6.5
V
Input, output current on any single pin
±5
mA
Power dissipation (based on package heat transfer limitations, not device power consumption)
1
W
PARAMETER
NOTES:
1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any conditions other than those described in the AC and DC Electrical Characteristics section
of this specification is not implied.
2. This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive static
charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maxima.
3. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise
noted.
40
IDD
(mA)
30
(1)
20
10
(2)
0
0
4
8
12
16
fXTAL1 (MHz)
(1) MAXIMUM OPERATING MODE: VDD = VDDmax
(2) MAXIMUM IDLE MODE: VDD = VDDmax
These values are valid within the specified
frequency range.
Figure 1. IDD vs. Frequency
December 1994
6
Philips Semiconductors
Product specification
CMOS single-chip 8-bit microcontroller
OM5232
DC ELECTRICAL CHARACTERISTICS
VSS = 0V, VDD = 5.0V ±10%. Operating temperature range 0 to 70°C.
TEST
SYMBOL
LIMITS
MIN.
MAX.
UNIT
Input low voltage,
except EA, P1.6, P1.7
–0.5
0.2VDD–0.1
V
VIL1
Input low voltage to EA
–0.5
0.2VDD–0.3
V
VIL2
Input low voltage to P1.6, P1.7
–0.5
0.3VDD
V
VIH
Input high voltage, except XTAL1, RST, P1.6, P1.7
0.2VDD+0.9
VDD+0.5
V
VIH1
Input high voltage, XTAL1, RST
0.7VDD
VDD+0.5
V
VIH2
Input high voltage, P1.6, P1.7
VOL
Output low voltage, ports 1, 2, 3, except P1.6, P1.7
VIL
PARAMETER
CONDITIONS
6.0
V
IOL = 1.6mA 7), 8)
0.7VDD
0.45
V
7), 8)
0.45
V
0.4
V
VOL1
Output low voltage, port 0, ALE, PSEN
IOL = 3.2mA
VOL2
Output low voltage, P1.6, P1.7
IOL = 3.0mA
VOH
Output high voltage, ports 1, 2, 3, ALE, PSEN 9)
IOH = –60µA
IOH = –25µA
IOH = –10µA
VOH1
Output high voltage; port 0 in external bus mode
IOH = –800µA
IOH = –300µA
IOH = –80µA
2.4
0.75VDD
0.9VDD
V
V
V
2.4
V
0.75VDD
V
0.9VDD
V
IIL
Logical 0 input current, ports 1, 2, 3, except P1.6, P1.7
VIN = 0.45V
–50
µA
ITL
Logical 1-to-0 transition current, ports 1, 2, 3,
except P1.6, P1.7
See note 6)
–650
µA
IL1
Input leakage current, port 0, EA
0.45V < VI < VDD
±10
µA
IL2
Input leakage current, P1.6, P1.7
0V < VI < 6.0V
0V < VDD < 6.0V
±10
µA
IDD
Power supply current:
Active mode @ 16MHz 2), 10)
Idle mode @ 16MHz 3), 10)
Power down mode 4), 5)
See note 1)
VDD=6.0V
26.5
6
50
mA
mA
µA
150
kΩ
10
pF
RRST
Internal reset pull-down resistor
CIO
Pin capacitance
50
Freq.=1MHz
NOTES FOR DC ELECTRICAL CHARACTERISTICS:
1. See Figures 9 through 11 for IDD test conditions.
2. The operating supply current is measured with all output pins disconnected; XTAL1 driven with tr = tf = 5ns;
VIL = VSS + 0.5V; VIH = VDD –0.5V; XTAL2 not connected; EA = RST = Port 0 = P1.6 = P1.7 = VDD. See Figure 9.
3. The idle mode supply current is measured with all output pins disconnected; XTAL1 driven with tr = tf = 5ns; VIL = VSS + 0.5V;
VIH = VDD –0.5V; XTAL2 not connected; Port 0 = P1.6 = P1.7 = VDD; EA = RST = VSS. See Figure 10.
4. The power-down current is measured with all output pins disconnected; XTAL2 not connected; Port 0 = P1.6 = P1.7 = VDD;
EA = RST = VSS. See Figure 11.
5. 2V ≤ VPD ≤ VDDmax.
6. Pins of ports 1 , 2, and 3 source a transition current when they are being externally driven from 1 to 0. The transition current reaches its
maximum value when VIN is approximately 2V.
7. Capacitive loading on ports 0 and 2 may cause spurious noise to be superimposed on the VOLs of ALE and ports 1 and 3. The noise is due
to external bus capacitance discharging into the port 0 and port 2 pins when these pins make 1-to-0 transitions during bus operations. In the
worst cases (capacitive loading > 100pF), the noise pulse on the ALE pin may exceed 0.8V. In such cases, it may be desirable to qualify
ALE with a Schmitt Trigger, or use an address latch with a Schmitt Trigger STROBE input.
8. Under steady state (non-transient) conditions, IOL must be externally limited as follows: Maximum IOL = 10mA per port pin; Maximum
IOL = 26mA total for Port 0; Maximum IOL = 15mA total for Ports 1, 2, and 3; Maximum IOL = 71mA total for all output pins. If IOL exceeds the
test conditions, VOL may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test conditions.
9. Capacitive loading on ports 0 and 2 may cause the VOH on ALE and PSEN to momentarily fall below the 0.9VDD specification when the
address bits are stabilizing.
10. IDDMAX for other frequencies can be derived from Figure 1, where FREQ is the external oscillator frequency in MHz. IDDMAX is given in mA.
December 1994
7
Philips Semiconductors
Product specification
CMOS single-chip 8-bit microcontroller
OM5232
AC ELECTRICAL CHARACTERISTICS1, 2
16MHz CLOCK
SYMBOL
FIGURE
PARAMETER
MIN
VARIABLE CLOCK
MAX
MIN
MAX
UNIT
1.2
16
MHz
1/tCLCL
2
Oscillator frequency
tLHLL
2
ALE pulse width
85
2tCLCL–40
ns
tAVLL
2
Address valid to ALE low
8
tCLCL–55
ns
tLLAX
2
Address hold after ALE low
28
tLLIV
2
ALE low to valid instruction in
tLLPL
2
ALE low to PSEN low
23
tCLCL–40
tPLPH
2
PSEN pulse width
143
3tCLCL–45
tPLIV
2
PSEN low to valid instruction in
tPXIX
2
Input instruction hold after PSEN
tPXIZ
2
Input instruction float after PSEN
38
tCLCL–25
ns
tAVIV
2
Address to valid instruction in
208
5tCLCL–105
ns
tPLAZ
2
PSEN low to address float
10
10
ns
tCLCL–35
150
ns
4tCLCL–100
83
ns
ns
3tCLCL–105
0
ns
0
ns
ns
Data Memory
tRLRH
3, 4
RD pulse width
275
6tCLCL–100
tWLWH
3, 4
WR pulse width
275
tRLDV
3, 4
RD low to valid data in
tRHDX
3, 4
Data hold after RD
tRHDZ
3, 4
Data float after RD
55
2tCLCL–70
ns
tLLDV
3, 4
ALE low to valid data in
350
8tCLCL–150
ns
tAVDV
3, 4
Address to valid data in
9tCLCL–165
ns
tLLWL
3, 4
ALE low to RD or WR low
138
3tCLCL+50
ns
tAVWL
3, 4
Address valid to WR low or RD low
120
4tCLCL–130
ns
tQVWX
3, 4
Data valid to WR transition
3
tCLCL–60
ns
tDW
3, 4
Data setup time before WR
288
7tCLCL–150
ns
tWHQX
3, 4
Data hold after WR
13
tRLAZ
3, 4
RD low to address float
tWHLH
3, 4
RD or WR high to ALE high
5
Serial port clock cycle time3
6tCLCL–100
148
ns
5tCLCL–165
0
0
398
238
3tCLCL–50
103
tCLCL–40
ns
ns
tCLCL–50
0
23
ns
ns
0
ns
tCLCL+40
ns
Shift Register
tXLXL
edge3
tQVXH
5
Output data setup to clock rising
tXHQX
5
Output data hold after clock rising edge3
edge3
0.75
12tCLCL
µs
492
10tCLCL–133
ns
80
2tCLCL–117
ns
tXHDX
5
Input data hold after clock rising
tXHDV
5
Clock rising edge to input data valid3
0
tCHCX
6
High time3
20
tCLCX
6
Low time3
20
tCLCH
6
Rise
time3
tCHCL
6
Fall time3
0
492
ns
10tCLCL–133
ns
20
tCLCL – tCLCX
ns
20
tCLCL – tCHCX
ns
20
20
ns
20
20
ns
External Clock
NOTES:
1. Parameters are valid over operating temperature range unless otherwise specified.
2. Load capacitance for port 0, ALE, and PSEN = 100pF, load capacitance for all other outputs = 80pF.
3. These values are characterized but not 100% production tested.
December 1994
8
Philips Semiconductors
Product specification
CMOS single-chip 8-bit microcontroller
OM5232
EXPLANATION OF THE AC SYMBOLS
Each timing symbol has five characters. The first character is always
‘t’ (= time). The other characters, depending on their positions,
indicate the name of a signal or the logical status of that signal. The
designations are:
A – Address
C – Clock
D – Input data
H – Logic level high
I – Instruction (program memory contents)
L – Logic level low, or ALE
P – PSEN
Q – Output data
R – RD signal
t – Time
V – Valid
W – WR signal
X – No longer a valid logic level
Z – Float
Examples: tAVLL = Time for address valid
to ALE low.
tLLPL = Time for ALE low
to PSEN low.
tLHLL
ALE
tPLPH
tLLPL
tAVLL
tLLIV
PSEN
tPLIV
tLLAX
INSTR IN
A0–A7
PORT 0
tPXIZ
tPLAZ
tPXIX
A0–A7
tAVIV
PORT 2
A8–A15
A8–A15
Figure 2. External Program Memory Read Cycle
ALE
tWHLH
PSEN
tLLDV
tLLWL
tRLRH
RD
tLLAX
tAVLL
tRLAZ
PORT 0
tRHDZ
tRLDV
tRHDX
A0–A7
FROM RI OR DPL
DATA IN
A0–A7 FROM PCL
tAVWL
tAVDV
PORT 2
P2.0–P2.7 OR A8–A15 FROM DPH
Figure 3. External Data Memory Read Cycle
December 1994
9
A8–A15 FROM PCH
INSTR IN
Philips Semiconductors
Product specification
CMOS single-chip 8-bit microcontroller
OM5232
ALE
tWHLH
PSEN
tWLWH
tLLWL
WR
tLLAX
tAVLL
tWHQX
tQVWX
tDW
A0–A7
FROM RI OR DPL
PORT 0
DATA OUT
A0–A7 FROM PCL
INSTR IN
tAVWL
PORT 2
P2.0–P2.7 OR A8–A15 FROM DPH
A8–A15 FROM PCH
Figure 4. External Data Memory Write Cycle
INSTRUCTION
0
1
2
3
4
5
6
7
8
ALE
tXLXL
CLOCK
tXHQX
tQVXH
OUTPUT DATA
WRITE TO SBUF
tXHDX
tXHDV
SET TI
INPUT DATA
VALID
VALID
VALID
VALID
VALID
VALID
VALID
VALID
CLEAR RI
SET RI
Figure 5. Shift Register Mode Timing
VIH1
0.8V
tCHCL
tCHCX
tCLCH
tCLCX
tCLCL
Figure 6. External Clock Drive at XTAL1
December 1994
10
Philips Semiconductors
Product specification
CMOS single-chip 8-bit microcontroller
VDD–0.5
OM5232
VLOAD+0.1V
0.2VDD+0.9
0.2VDD–0.1
0.45V
VOH–0.1V
TIMING
REFERENCE
POINTS
VLOAD
VLOAD–0.1V
VOL+0.1V
NOTE:
FOR TIMING PURPOSES, A PORT IS NO LONGER FLOATING WHEN A 100MV
CHANGE FROM LOAD VOLTAGE OCCURS, AND BEGINS TO FLOAT WHEN A
100mV CHANGE FROM THE LOADED VOH/VOL LEVEL OCCURS. IOH/IOL > +
20mA.
NOTE:
AC INPUTS DURING TESTING ARE DRIVEN AT VDD–0.5 FOR A LOGIC ’1’ AND
0.45V FOR A LOGIC ’0’. TIMING MEASUREMENTS ARE MADE AT VIH MIN FOR A
LOGIC ’1’ AND VIL MAX FOR A LOGIC ’0’.
Figure 7. AC Testing Input/Output
Figure 8. Float Waveform
VDD
VDD
IDD
IDD
VDD
VDD
VDD
VDD
RST
VDD
RST
EA
P0
P0
EA
(NC)
XTAL2
P1.6
*
*
P1.7
CLOCK SIGNAL
XTAL1
(NC)
XTAL2
CLOCK SIGNAL
P1.6
*
P1.7
*
XTAL1
VSS
VSS
Figure 9. IDD Test Condition, Active Mode
All other pins are disconnected
Figure 10. IDD Test Condition, Idle Mode
All other pins are disconnected
VDD
IDD
VDD
VDD
RST
EA
P0
(NC)
P1.6
XTAL2
P1.7
XTAL1
*
*
VSS
Figure 11. IDD Test Condition, Power Down Mode
All other pins are disconnected. VDD = 2V to 5.5V
NOTE:
* Ports 1.6 and 1.7 should be connected to VCC through resistors of sufficiently high value such that the sink current into these pins does not
exceed the IOL1 specification.
December 1994
11
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