P80C32SBBB,557 NXP Semiconductors, P80C32SBBB,557 Datasheet - Page 6
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P80C32SBBB,557
Manufacturer Part Number
P80C32SBBB,557
Description
IC 80C51 MCU 256 ROMLESS 44-QFP
Manufacturer
NXP Semiconductors
Series
80Cr
Datasheet
1.P80C31SBBB557.pdf
(32 pages)
Specifications of P80C32SBBB,557
Core Processor
8051
Core Size
8-Bit
Speed
16MHz
Connectivity
UART/USART
Peripherals
POR
Number Of I /o
32
Program Memory Type
ROMless
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
44-MQFP, 44-PQFP
Data Bus Width
8 bit
Program Memory Size
32 KB
Data Ram Size
256 B
Interface Type
UART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Other names
935255820557
P80C32SBBB
P80C32SBBB
P80C32SBBB
P80C32SBBB
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
P80C32SBBB,557
Manufacturer:
NXP Semiconductors
Quantity:
10 000
Philips Semiconductors
PIN DESCRIPTIONS
NOTE:
To avoid “latch-up” effect at power-on, the voltage on any pin at any time must not be higher than V
2000 Aug 07
V
V
P0.0–0.7
P1.0–P1.7
P2.0–P2.7
P3.0–P3.7
RST
ALE
PSEN
EA/V
XTAL1
XTAL2
MNEMONIC
SS
CC
80C51 8-bit microcontroller family
128/256 byte RAM ROMless low voltage (2.7V–5.5V),
low power, high speed (33 MHz)
PP
39–32 43–36
21–28 24–31
10–17
DIP
1–8
20
40
10
11
12
13
14
15
16
17
30
29
31
19
18
1
2
9
PIN NUMBER
13–19
LCC
2–9
11,
22
44
13
14
15
16
17
18
19
10
33
32
35
21
20
11
2
3
40–44,
37–30
18–25
7–13
QFP
1–3
16
38
40
41
10
11
12
13
27
26
29
15
14
5,
5
7
8
9
4
TYPE NAME AND FUNCTION
I/O
I/O
I/O
I/O
I/O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
I
Ground: 0 V reference.
Power Supply: This is the power supply voltage for normal, idle, and power-down operation.
Port 0: Port 0 is an open-drain, bidirectional I/O port with Schmitt trigger inputs. 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.
Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups and Schmitt trigger
inputs. 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: I
functions for Port 1 include:
Port 2: Port 2 is an 8-bit bidirectional I/O port with internal pull-ups and Schmitt trigger
inputs. 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: I
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.
Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups and Schmitt trigger
inputs. 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: I
the special features of the 80C51 family, as listed below:
Reset: A high on this pin for two machine cycles while the oscillator is running, resets the
device. An internal diffused resistor to V
capacitor to V
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, and can be used for external timing or clocking. Note that one ALE
pulse is skipped during each access to external data memory. ALE can be disabled by
setting SFR auxiliary.0. With this bit set, ALE will be active only during a MOVX instruction.
Program Store Enable: The read strobe to external program memory. When the 80C31/32
is executing code from the external program memory, PSEN is activated twice each
machine cycle, except that two PSEN activations are skipped during each access to
external data memory. PSEN is not activated during fetches from internal program memory.
External Access Enable/Programming Supply Voltage: EA must be externally held low
to enable the device to fetch code from external program memory locations 0000H to
0FFFH.
Crystal 1: Input to the inverting oscillator amplifier and input to the internal clock generator
circuits.
Crystal 2: Output from the inverting oscillator amplifier.
T2 (P1.0): Timer/Counter 2 external count input/clockout (see Programmable Clock-Out)
T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction control
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
CC
.
6
SS
permits a power-on reset using only an external
CC
+ 0.5 V or V
SS
80C31/80C32
– 0.5 V, respectively.
IL
). Port 3 also serves
Product specification
IL
IL
). Alternate
). Port 2 emits