P87C51SBPN NXP Semiconductors, P87C51SBPN Datasheet - Page 33

• Manufacturer Part Number: P87C51SBPN
• Description: MCU 8-Bit 87C 80C51 CISC 4KB EPROM 3.3V/5V 40-Pin PDIP Tube
• Manufacturer: NXP Semiconductors

Specifications of P87C51SBPN

• Program Memory Size: 4 KB
• Package: 40PDIP
• Device Core: 80C51
• Family Name: 87C
• Maximum Speed: 16 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 32
• Interface Type: UART
• Number Of Timers: 3
• Ram Size: 128 Byte
• Program Memory Type: EPROM
• Operating Temperature: 0 to 70 °C
• Controller Family/series: 80C51
• No. Of I/o's: 32
• Ram Memory Size: 128Byte
• Cpu Speed: 16MHz
• No. Of Timers: 3
• Digital Ic Case Style: DIP
• Core Size: 8 Bit
• Embedded Interface Type: UART
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

*
**
1. P – programmed. U – unprogrammed.
2. Any other combination of the security bits is not defined.
Philips Semiconductors
NOTES:
MASK ROM DEVICES
Security Bits
With none of the security bits programmed the code in the program
memory can be verified. If the encryption table is programmed, the
code will be encrypted when verified. When only security bit 1 (see
Table 10) is programmed, MOVC instructions executed from
external program memory are disabled from fetching code bytes
Table 10. Program Security Bits
NOTES:
2000 Aug 07
PROGRAM LOCK BITS
80C51 8-bit microcontroller family
4 K/8 K OTP/ROM low voltage (2.7 V–5.5 V),
low power, high speed (33 MHz), 128/256 B RAM
FOR PROGRAMMING CONFIGURATION SEE FIGURE 26.
FOR VERIFICATION CONDITIONS SEE FIGURE 28.
SEE TABLE 8.
1
2
P0.0 – P0.7
ALE/PROG
(A0 – A12)
P1.0–P1.7
P2.0–P2.5
(D0 – D7)
PORT 0
EA/V
P2.7
P3.4
PP
**
SB1
U
P
SB2
U
U
1, 2
t
t
AVGL
DVGL
t
EHSH
PROTECTION DESCRIPTION
No Program Security features enabled.
(Code verify will still be encrypted by the Encryption Array if programmed.)
MOVC instructions executed from external program memory are disabled from fetching code bytes from
internal memory, EA is sampled and latched on Reset, and further programming of the EPROM is disabled.
t
SHGL
t
GLGH
PROGRAMMING
Figure 29. EPROM Programming and Verification
ADDRESS
DATA IN
*
t
GHGL
LOGIC 0
t
t
GHDX
GHAX
33
t
GHSL
from the internal memory, EA is latched on Reset and all further
programming of the EPROM is disabled. When security bits 1 and 2
are programmed, in addition to the above, verify mode is disabled.
Encryption Array
64 bytes of encryption array are initially unprogrammed (all 1s).
LOGIC 1
t
ELQV
80C51/87C51/80C52/87C52
VERIFICATION
t
AVQV
ADDRESS
LOGIC 1
DATA OUT
*
t
EHQZ
Product specification
SU01414