83C754 Philips Semiconductors, 83C754 Datasheet - Page 19

• Manufacturer Part Number: 83C754
• Description: 80C51 8-bit microcontroller family 4K/256 OTP/ROM/ DAC/ comparator/ UART/ reference
• Manufacturer: Philips Semiconductors

Philips Semiconductors
ROM CODE SUBMISSION
When submitting ROM code for the 83C754, the following must be specified:
1. 4k byte user ROM data
2. 64 byte ROM encryption key
3. ROM security bits.
Security Bit 1: When programmed, this bit has two effects on masked ROM parts:
1. External MOVC is disabled, and
2. EA# is latched on Reset.
Security Bit 2: When programmed, this bit inhibits Verify User ROM.
If the ROM Code file does not include the options, the following information must be included with the ROM code.
For each of the following, check the appropriate box, and send to Philips along with the code:
1998 Apr 23
80C51 8-bit microcontroller family
4K/256 OTP/ROM, DAC, comparator, UART, reference
ADDRESS
0000H to 0FFFH
1000H to 101FH
1020H
1020H
Security Bit #1:
Security Bit #2:
Encryption:
Enabled
Enabled
No
Maximum I
CONTENT
DATA
KEY
SEC
SEC
I
CC
Notes 6 and 7 refer to AC Electrical Characteristics.
Typical I
CC
mA
Disabled
Disabled
Yes
values taken at V
22
20
18
16
14
12
10
8
6
4
2
CC
If Yes, must send key file.
values taken at V
Figure 19. I
4MHz
CC
8MHz
19
FREQ
= 5.5V and worst case temperature.
CC
BIT(S)
7:0
7:0
0
1
vs. FREQ
CC
12MHz
= 5.0V and 25 C.
16MHz
MAX ACTIVE I
TYP ACTIVE I
MAX IDLE I
TYP IDLE I
SU00308
CC
CC
CC
7
CC
7
6
6
COMMENT
User ROM Data
ROM Encryption Key
FFH = no encryption
ROM Security Bit 1
0 = enable security
1 = disable security
ROM Security Bit 2
0 = enable security
1 = disable security
83C754/87C754
Preliminary specification