IP4855CX25 NXP [NXP Semiconductors], IP4855CX25 Datasheet - Page 6

• Manufacturer Part Number: IP4855CX25
• Description: SD 3.0-compliant memory card integrated voltage level translator with EMI filter and ESD protection
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
Table 6.
[1]
[2]
IP4855CX25
Product data sheet
Input
SEL
H
L
H = HIGH and L = LOW.
Host-side pins are not influenced by SEL.
[1]
SD card side voltage level control signal truth table
V
irrelevant
< 1 V
> 1.5 V
SD_REF
8.2 Enable and direction control
8.3 Integrated voltage regulator
The pin ENABLE enables/disables the Low DropOut (LDO) and is used to put the
host-side, card-side I/O drivers into high-ohmic 3-state mode.
Table 5.
[1]
The low dropout voltage regulator delivers supply voltage for the voltage translators and
the card-side input/output stages. It has to support 1.8 V and 3 V signaling modes as
stipulated in the SD 3.0 specification. The switching time between the two output voltage
modes is compliant with SD 3.0 specification. Depending on the signaling level at pin
SEL, the regulator delivers 1.8 V (SEL = HIGH) or 2.9 V (SEL = LOW, V
card supply voltage, see
Control
Pin
DIR_CMD
DIR_0
DIR_1_3
-
-
Pin ENABLE = LOW or V
Output
V
1.8 V
V
Pin ENABLE = HIGH and V
DIR_CMD
DIR_0
DIR_1_3
-
-
2.9 V
LDO
SD_REF
H = HIGH; L = LOW and X = irrelevant.
I/O function control signal truth table
Pin
DATA0_SD to DATA3_SD, CLK_SD
DATA0_SD to DATA3_SD, CLK_SD
DATA0_SD to DATA3_SD, CLK_SD
SD 3.0-compliant memory card integrated dual voltage level translator
[2]
H
H
H
X
Level
L
L
L
-
-
X
X
-
-
All information provided in this document is subject to legal disclaimers.
[1]
Rev. 1 — 13 September 2012
CCA
Section
CCA
 0.8 V
 1.62 V
Host-side
Pin
CMD_H
CMD_H
DATA0_H
DATA0_H
DATA1_H
DATA2_H
DATA3_H
DATA1_H
DATA2_H
DATA3_H
CLK_IN
CLK_FB
CMD_H
DATA0_H
DATA1_H
DATA2_H
DATA3_H
CLK_IN
CLK_IN
8.4.
Function
input
output
input
output
input
output
input
output
high-ohmic
high-ohmic
high-ohmic
input
high-ohmic
Function
low supply voltage level (1.8 V
high supply voltage level (2.9 V
supply voltage level based on V
Memory card-side
Pin
CMD_SD
CMD_SD
DATA0_SD
DATA0_SD
DATA1_SD
DATA2_SD
DATA3_SD
DATA1_SD
DATA2_SD
DATA3_SD
CLK_SD
-
CMD_SD
DATA0_SD
DATA1_SD
DATA2_SD
DATA3_SD
CLK_SD
-
IP4855CX25
© NXP B.V. 2012. All rights reserved.
SD_REF
Function
output
input
output
input
output
input
output
-
high-ohmic
high-ohmic
high-ohmic
high-ohmic
-
< 1 V). For
typ
typ
SD_REF
)
)
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