TDA8029 Philips Semiconductors, TDA8029 Datasheet - Page 26

• Manufacturer Part Number: TDA8029
• Description: Low power single card reader
• Manufacturer: Philips Semiconductors

Philips Semiconductors
8.6.1
Table 29 Auxiliary register bits
Table 30 Description of register bits
Note
1. Do not write logic 1s to reserved bits. These bits may be used in future 80C51 family products to invoke new features.
8.7
When bit AO = 1 (bit 0 in the AUXR register), the ALE output is disabled.
2003 Oct 30
handbook, full pagewidth
Symbol
Low power single card reader
7 to 2
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.
BIT
BIT
1
0
Reduced EMI mode
A
UXILIARY
EXTRAM
AO
SYMBOL
R
1FFh
7
EGISTER
00h
Fig.9 Internal and external data memory address space with EXTRAM = 0.
512-BYTE
MOVX
XRAM
(AUXR)
Not implemented. Reserved for future use; note 1.
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
ALE is active only during a MOVX or MOVC instruction.
BY
6
FFh
80h
00h
INTERNAL
INTERNAL
128-BYTE
128-BYTE
LOWER
UPPER
5
RAM
RAM
26
FFh
80h
00h
4
REGISTERS
FUNCTION
SPECIAL
DESCRIPTION
3
FFFFh
200h
00h
EXTERNAL
MEMORY
DATA
2
MCE651
EXTRAM
Product specification
1
1
/
6
TDA8029
f
XTAL
; if AO = 1,
AO
0