TDA8029 Datasheet, PDF (45/59 Pages) NXP Semiconductors – Low power single card reader

Philips Semiconductors
TDA8029
Low power single card reader
t₁₁ = t₁₀ + ³â„₆₄T, t₁₂ = t₁₁ + ¹â„₂T, t₁₃ = t₁₁ + T, t₁₄ = t₁₁ + ³â„₂T, t₁₅ = t₁₁ + ⁷⁄₂T.
t_de is the time that V_CC needs for going down to less than 0.4 V.
Automatic emergency deactivation is performed in the following cases:
• Withdrawal of the card (PRES LOW)
• Overcurrent detection on V_CC (bit PRTL1 set)
• Overcurrent detection on RST (bit PRTL1 set)
• Overheating (bit PTL set)
• V_DD low (bit SUPL set)
• RESET pin active HIGH.
If the reason of the deactivation is a card take off, an overcurrent or an overheating, then
INT0_N is LOW. The corresponding bit in the hardware status register is set. Bit START is
automatically reset.
If the reason is a supply dropout, then the deactivation sequence occurs, and a complete
reset of the chip is performed. When the supply will be OK again, then the bit SUPL will be
set in HSR.
START
RST
CLK
I/O
V_CC
V_UP
t₁₀ t₁₁
t₁₂
t₁₃
t₁₄
t_de
Fig 13. Deactivation sequence
9. Limiting values
Table 73: Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter
Conditions
V_DCIN
V_DD
V_n
input voltage for the DC-to-DC converter
supply voltage
voltage limit
on pins SAM, SBM, SAP, SBP, VUP
on all other pins
9397 750 14145
Product data sheet
Rev. 03 — 22 February 2005
t₁₅
fce685
Min
Max
Unit
−0.5
+6.5
V
−0.5
+6.5
V
−0.5
−0.5
+7.5
V
V_DD + 0.5 V
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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