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ST25R200 数据表(PDF) 16 Page - STMicroelectronics

部件名 ST25R200
功能描述  NFC/HF RFID reader IC
PDF  88 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST25R200 数据表(HTML) 16 Page - STMicroelectronics

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Table 2. SPI signal lines
Name
Signal
Signal level
Description
BSS
Digital input
CMOS
SPI enable (active low)
MOSI
Digital input
CMOS
Serial data input
SCLK
Digital input
CMOS
Clock for serial communication
MISO
Digital output with tristate
CMOS
Serial data output
MISO output is usually in tristate. It is only driven when output data is available. Due to this the MOSI and the
MISO can be externally shorted to create a bidirectional signal.
During the time the MISO output is in tristate, it is possible to switch on a 10 kΩ pull down by activating option bits
miso_pd1 and miso_pd2.
Figure 8. SPI data signals with a host
MOSI
MISO
MISO
MOSI
ST25R
MOSI
MISO
I/O MCU
ST25R
MCU
The following addressing scheme is used:
•
Bit 7 indicates the direction of the operation (0-Write / 1-Read)
•
95 addressable registers (0x00 - 0x5E)
•
64 command codes (0x60 - 0x7F and 0xE0 - 0xFF)
•
FIFO access (0x5F)
•
Test/OTP registers access (0xFC)
For specific details on ST25R200 registers and commands, refer to the Section 5.14: Registers and
Section 5.15: Direct commands.
Table 3. SPI operation modes
MODE
MODE pattern (com. bits)
Related data
R/W B6 B5 B4 B3 B2 B1 B0
Register write
0
A6 A5 A4 A3 A2 A1 A0
Data byte (or more bytes in case of auto-incrementing) A<6,0>=0x5E
max
Register read
1
A6 A5 A4 A3 A2 A1 A0
Data byte (or more bytes in case of auto-incrementing) A<6,0>=0x5E
max
Commands
C7
1
1
C4 C3 C2 C1 C0 -
Test
1
1
1
1
1
1
0
0
Enable access to test registers
FIFO write
0
1
0
1
1
1
1
1
One or more bytes of FIFO data
FIFO read
1
1
0
1
1
1
1
1
One or more bytes of FIFO data
ST25R200
Application information
DS13658 - Rev 2
page 16/88



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