tda8029hl-c207 NXP Semiconductors, tda8029hl-c207 Datasheet - Page 26

• Manufacturer Part Number: tda8029hl-c207
• Description: Low Power Single Card Reader
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 14145
Product data sheet
8.7 Reduced EMI mode
8.8 Mask ROM devices
8.9 ROM code submission for 16 kB ROM device TDA8029HL/C1
Table 33:
[1]
When bit AO = 1 (bit 0 in the AUXR register), the ALE output is disabled.
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 is programmed, MOVC instructions executed from
external program memory are disabled from fetching code bytes from the internal
memory. When security bits 1 and 2 are programmed, in addition to the above, verify
mode is disabled.
Encryption array: 64 byte of encryption array are initially unprogrammed (all 1s).
Table 34:
[1]
When submitting ROM code for 16 kB ROM devices, the following must be specified:
Bit
7 to 2
1
0
Program lock bits
SB1
no
yes
yes
•
•
•
Do not write logic 1s to reserved bits. These bits may be used in future 80C51 family products to invoke
new features. In that case, the reset or inactive value of the new bit will be logic 0, and its active value will
be logic 1. The value read from a reserved bit is indeterminate.
Any other combination of the security bits is not defined.
16 kB user ROM data
64 byte ROM encryption key
ROM security bits.
Symbol
-
EXTRAM
AO
AUXR - auxiliary register (address 8Eh) bit description
Program security bits for TDA8029
SB2
no
no
yes
[1]
Rev. 03 — 22 February 2005
Description
Not implemented. Reserved for future use
External RAM access. Internal or external RAM access using
MOVX @Ri/@DPTR. If EXTRAM = 0, internal expanded RAM (0000h
to 01FFh) access using MOVX @Ri/@DPTR; if EXTRAM = 1, external
data memory access.
ALE enable or disable. If AO = 0, ALE is emitted at a constant rate of
1
instruction.
6
f
Protection description
no program security features enabled. If the encryption array is
programmed, code verify will still be encrypted.
MOVC instructions executed from external program memory are
disabled from fetching code bytes from internal memory
same as above, also verify is disabled
XTAL
; if AO = 1, ALE is active only during a MOVX or MOVC
Low power single card reader
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
[1]
TDA8029
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