Z8F1680SH020SG Datasheet, PDF (194/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
169
Table 88. Mode Status Fields
MULTIPROCESSOR
Mode Status Field
NEWFRM
Status bit denoting the start of a new frame. Reading the LIN-UART Receive
Data Register resets this bit to 0.
0 = The current byte is not the first data byte of a new frame.
1 = The current byte is the first data byte of a new frame.
Multiprocessor Receive (MPRX)
Returns the value of the last multiprocessor bit received. Reading from the LIN-
UART Receive Data Register resets this bit to 0.
Digital Noise Filter
Mode Status Field
Noise Event (NE); MSEL = 001b
This bit is asserted if digital noise is detected on the receive data line when the
data is sampled (center of bit-time). If this bit is set, it does not mean that the
receive data is corrupted (though it can be in extreme cases), means that one or
more of the noise filter data samples near the center of the bit-time did not match
the average data value.
LIN Mode Status Field
Noise Event (NE); MSEL = 010b
This bit is asserted if some noise level is detected on the receive data line when
the data is sampled (center of bit-time). If this bit is set, it does not indicate that
the receive data is corrupt (though it can be in extreme cases), means that one or
more of the 16x data samples near the center of the bit-time did not match the
average data value.
RxBreakLength
LIN mode received break length. This field can be read following a break (LIN
Wake-up or Break) so that the software can determine the measured duration of
the break. If the break exceeds 15 bit times the value saturates at 1111b.
Hardware Revision
Mode Status Field
Noise Event (NE); MSEL = 111b
This field indicates the hardware revision of the LIN-UART block.
00_xxx LIN UART hardware revision.
01_xxx Reserved.
10_xxx Reserved.
11_xxx Reserved.
PS025015-1212
PRELIMINARY
LIN-UART