tda8029hl-c207 NXP Semiconductors, tda8029hl-c207 Datasheet - Page 20

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

Philips Semiconductors
9397 750 14145
Product data sheet
Fig 6. UART framing error detection
START
Table 22:
In the above example the differentiation among the 3 slaves is in the lower 3 address bits.
Slave 0 requires that bit 0 = 0 and it can be uniquely addressed by 1110 0110. Slave 1
requires that bit 1 = 0 and it can be uniquely addressed by 1110 and 0101. Slave 2
requires that bit 2 = 0 and its unique address is 1110 0011. To select slaves 0 and 1 and
exclude slave 2 use address 1110 0100, since it is necessary to make bit 2 = 1 to exclude
slave 2.
The broadcast address for each slave is created by taking the logical OR of SADDR and
SADEN. Zeros in this result are treated as don’t cares. In most cases, interpreting the
don’t cares as ones, the broadcast address will be FFh.
Upon reset SADDR (SFR address 0A9h) and SADEN (SFR address 0B9h) are leaded
with 0s. This produces a given address of all ‘don’t cares’ as well as a broadcast address
of all ‘don’t cares’. This effectively disables the automatic addressing mode and allows the
microcontroller to use standard 80C51 type UART drivers which do not make use of this
feature.
Register
SADDR
SADEN
Given
bit
SM0/FE
SMOD1
D0
0 : SCON.7 = SM0
1 : SCON.7 = FE
Slave 2 address definition; example 2
SMOD0
SM1
D1
SM2
D2
-
Rev. 03 — 22 February 2005
Set FE bit if STOP bit is 0 (framing error)
SM0 to UART mode control
REN
POF
D3
DATA byte
D4
TB8
GF1
D5
RB8
GF0
Value (binary)
1110 0000
1111 1100
1110 00XX
D6
PD
TI
D7
Low power single card reader
IDL
RI
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
MODE 2, 3
only
D8
in
SCON
PCON
(98h)
(87h)
mdb816
STOP
bit
TDA8029
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