Information

UARTx_WP7816T1 field descriptions (continued)
Field Description
Used to calculate the value used for the CWT counter. It represents a value between 0 and 15. This value
is used only when C7816[TTYPE] = 1. See Wait time and guard time parameters .
3–0
BWI
Block Wait Time Integer(C7816[TTYPE] = 1)
Used to calculate the value used for the BWT counter. It represent a value between 0 and 15. This value
is used only when C7816[TTYPE] = 1. See Wait time and guard time parameters .
45.3.28 UART 7816 Wait N Register (UARTx_WN7816)
The WN7816 register contains a parameter that is used in the calculation of the guard
time counter. This register may be read at any time. This register must be written to only
when C7816[ISO_7816E] is not set.
Addresses: UART0_WN7816 is 4006_A000h base + 1Ch offset = 4006_A01Ch
UART1_WN7816 is 4006_B000h base + 1Ch offset = 4006_B01Ch
UART2_WN7816 is 4006_C000h base + 1Ch offset = 4006_C01Ch
Bit 7 6 5 4 3 2 1 0
Read
GTN
Write
Reset
0 0 0 0 0 0 0 0
UARTx_WN7816 field descriptions
Field Description
7–0
GTN
Guard Band N
Defines a parameter used in the calculation of GT, CGT, and BGT counters. The value represents an
integer number between 0 and 255. See Wait time and guard time parameters .
45.3.29 UART 7816 Wait FD Register (UARTx_WF7816)
The WF7816 contains parameters that are used in the generation of various counters
including GT, CGT, BGT, WT, and BWT. This register may be read at any time. This
register must be written to only when C7816[ISO_7816E] is not set.
Addresses: UART0_WF7816 is 4006_A000h base + 1Dh offset = 4006_A01Dh
UART1_WF7816 is 4006_B000h base + 1Dh offset = 4006_B01Dh
UART2_WF7816 is 4006_C000h base + 1Dh offset = 4006_C01Dh
Bit 7 6 5 4 3 2 1 0
Read
GTFD
Write
Reset
0 0 0 0 0 0 0 1
Memory map and registers
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
1082 Freescale Semiconductor, Inc.