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MS51
Nov. 28, 2019
Page
387
of 491
Rev 1.00
MS51
32K
SE
RIES
TE
CHNICAL RE
F
EREN
CE MA
N
UAL
6.10 ISO 7816-3 Interface (SC0~2 & UART2 ~ 4)
6.10.1 Overview
The MS51 32K series provides ISO 7816-3 Interface controller (SC controller) with asynchronous
protocal based on ISO/IEC 7816-3 standard. Software controls GPIO pins as the smartcard reset
function and card detection function. This controller also provides UART emulation for high precision
baud rate communication.
RX_FIFO
TX_FIFO
TX/RX
Control Unit
RX Shift
Register
TX Shift
Register
ETU Clock
Generator
Control and Status
Registers
Baud Rate
Generator
Internal Data Bus
TX_OUT
RX_IN
Figure 6.10-1 SC Controller Block Diagram
ISO-7816-3 T = 0, T = 1 compliant
Programmable transmission clock frequency
Programmable extra guard time selection
Supports auto inverse convention function
Supports UART mode
–
Full duplex, asynchronous communications
–
Supports programmable baud rate generator for each channel
–
Programmable transmitting data delay time between the last stop bit leaving the TX-
FIFO and the de-assertion by setting SCnEGT register
–
Programmable even, odd or no parity bit generation and detection
–
Programmable stop bit, 1 or 2 stop bit generation
Following is the ISO 7816-3 multi function pin define
URAT Pin
SC Pin
Pin Name
SFR Define
SFR Byte Name
SFR Bit Name
Value
UART2_TXD
SC0_CLK
P0.3
AUXR2[7:6]
UART2TXP
01
P3.0
10
UART2_RXD
SC0_DAT
P0.4
AUXR2[5:4]
UART2RXP
01