TDA8029HL/C207,118 NXP Semiconductors, TDA8029HL/C207,118 Datasheet - Page 15

• Manufacturer Part Number: TDA8029HL/C207,118
• Description: IC SMART CARD READER 32-LQFP
• Manufacturer: NXP Semiconductors

Specifications of TDA8029HL/C207,118

• Package / Case: 32-LQFP
• Controller Type: Smart Card Reader Interface
• Interface: Serial
• Voltage - Supply: 2.7 V ~ 6 V
• Current - Supply: 250mA
• Operating Temperature: -40°C ~ 90°C
• Mounting Type: Surface Mount
• Maximum Operating Temperature: + 90 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-2233-2; 935274733118; TDA8029HL07BD-T

Philips Semiconductors
9397 750 14145
Product data sheet
The baud rates in modes 1 and 3 are determined by the overflow rate of timer 2, given by
Equation
The timer can be configured for either timer or counter operation. In many applications, it
is configured for timer operation (C/T2 = 0). Timer operation is different for timer 2 when it
is being used as a baud rate generator.
Usually, as a timer it would increment every machine cycle (i.e.
generator, it increments every state time (i.e.
formula is as
Where (RCAP2H, RCAP2L) is the contents of RCAP2H and RCAP2L registers taken as a
16-bit unsigned integer.
The timer 2 as a baud rate generator is valid only if RCLK = 1 and/or TCLK = 1 in the
T2CON register. Note that a rollover in TH2 does not set TF2, and will not generate an
interrupt. Thus, the timer 2 interrupt does not have to be disabled when timer 2 is in the
baud rate generator mode. Also if the EXEN2 (T2 external enable) flag is set, a HIGH to
LOW transition on T2EX (timer/counter 2 trigger input) will set the EXF2 (T2 external) flag
but will not cause a reload from (RCAP2H and RCAP2L) to (TH2 and TL2). Therefore,
when timer 2 is used as a baud rate generator, T2EX can be used as an additional
external interrupt, if needed.
When timer 2 is in the baud rate generator mode, never try to read or write TH2 and TL2.
As a baud rate generator, timer 2 is incremented every state time (
asynchronously from controller I/O T2; under these conditions, a read or write of TH2 or
TL2 may not be accurate. The RCAP2 registers may be read, but should not be written to,
because a write might overlap a reload and cause write and/or reload errors. The timer
should be turned off (clear TR2) before accessing the timer 2 or RCAP2 registers. See
Figure 5
Table 12:
Baud rate
Baud rate
Baud rate (Bd)
375k
9.6k
2.8k
2.4k
1.2k
300
110
300
110
for an overview.
1:
Timer 2 generated commonly used baud rates
=
=
Equation
Timer 2 overflow rate
---------------------------------------------------------- -
---------------------------------------------------------------------------------------------
32
65536
Oscillator frequency
Rev. 03 — 22 February 2005
Crystal oscillator
frequency (MHz)
12
12
12
12
12
12
12
6
6
2:
16
–
RCAP2H RCAP2L
1
Timer
RCAP2H (hex)
FF
FF
FF
FF
FE
FB
F2
FD
F9
2
f
osc
). Thus the modes 1 and 3 baud rate
Low power single card reader
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
1
12
1
f
RCAP2L (hex)
FF
D9
B2
64
C8
1E
AF
8F
57
2
osc
f
osc
TDA8029
). As a baud rate
) or
15 of 59
(1)
(2)