Uart 7816 Interrupt Enable Register (Uartx_Ie7816) - NXP Semiconductors MKL27Z128VFM4 Reference Manual

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No NACK is automatically generated.

A NACK is automatically generated if a parity error is detected or if an invalid initial character is

Detect Initial Character

When this field is set, all received characters are searched for a valid initial character. If an invalid initial

character is identified, and ANACK is set, a NACK is sent. All received data is discarded and error flags

blocked (S1[NF], S1[OR], S1[FE], S1[PF], IS7816[WT], IS7816[CWT], IS7816[BWT], IS7816[ADT],

IS7816[GTV]) until a valid initial character is detected. Upon detecting a valid initial character, the

configuration values S2[MSBF], C3[TXINV], and S2[RXINV] are automatically updated to reflect the initial

character that was received. The actual INIT data value is not stored in the receive buffer. Additionally,

upon detection of a valid initial character, IS7816[INITD] is set and an interrupt issued as programmed by

IE7816[INITDE]. When a valid initial character is detected, INIT is automatically cleared. This Initial

Character Detect feature is supported only in T = 0 protocol mode.

Normal operating mode. Receiver does not seek to identify initial character.

Receiver searches for initial character.

Transfer Type

Indicates the transfer protocol being used.

ISO-7816 / smartcard support

T = 0 per the ISO-7816 specification.

T = 1 per the ISO-7816 specification.

ISO-7816 Functionality Enabled

Indicates that the UART is operating according to the ISO-7816 protocol.

NOTE: This field must be modified only when no transmit or receive is occurring. If this field is changed

ISO-7816 functionality is turned off/not enabled.

ISO-7816 functionality is turned on/enabled.

38.4.14 UART 7816 Interrupt Enable Register (UARTx_IE7816)

The IE7816 register controls which flags result in an interrupt being issued. This register

is specific to 7816 functionality, the corresponding flags that drive the interrupts are not

asserted when 7816E is not set/enabled. However, these flags may remain set if they are

asserted while 7816E was set and not subsequently cleared. This register may be read or

written to at any time.

Address: 4006_C000h base + 19h offset = 4006_C019h

Freescale Semiconductor, Inc.

UARTx_C7816 field descriptions (continued)

for more details.

during a data transfer, the data being transmitted or received may be transferred incorrectly.

KL27 Sub-Family Reference Manual , Rev. 5, 01/2016

Chapter 38 Universal Asynchronous Receiver/Transmitter(UART)