Z86D86 Datasheet, PDF (49/80 Pages) Zilog, Inc. – 28-Pin Low-Voltage OTP Microcontroller

Z86D86
28-Pin Low-Voltage OTP Microcontroller
41
T8/T16_Logic/Edge _Detect
In transmit mode, this field defines how the outputs of T8 and T16 are combined
(AND, OR, NOR, NAND).
In demodulation mode, this field defines which edge needs to be detected by the
edge detector.
Transmit_Submode/Glitch Filter
In transmit mode, this field defines whether T8 and T16 are in the “Ping-Pong”
mode or in independent normal operation mode. Setting this field to “Normal
Operation Mode” terminates the “Ping-Pong Mode” operation. When set to 10,
T16 is immediately forced to a 0; a setting of 11 forces T16 to output a 1.
In demodulation mode, this field defines the width of the glitch that needs to be fil-
tered out.
Initial_T8_Out/Rising_Edge
In transmit mode, if 0, the output of T8 is set to 0 when it starts to count. If 1, the
output of T8 is set to 1 when it starts to count. When the counter is not enabled
and this bit is set to 1 or 0, T8_OUT is set to the opposite state of this bit. This
measure ensures that when the clock is enabled, a transition occurs to the initial
state set by CTR1, D1.
In demodulation mode, this bit is set to 1 when a rising edge is detected in the
input signal. In order to reset it, a 1 must be written to this location.
Initial_T16 Out/Falling _Edge
In transmit mode, if it is 0, the output of T16 is set to 0 when it starts to count. If it
is 1, the output of T16 is set to 1 when it starts to count. This bit is effective only in
Normal or Ping-Pong Mode (CTR1, D3, D2). When the counter is not enabled and
this bit is set, T16_OUT is set to the opposite state of this bit. This measure
ensures that when the clock is enabled, a transition occurs to the initial state set
by CTR1, D0.
In demodulation mode, this bit is set to 1 when a falling edge is detected in the
input signal. In order to reset it, a 1 must be written to this location.
Note: Modifying CTR1 (D1 or D0) while the counters are enabled
causes unpredictable output from T8/16_OUT.
PS008905-0105
PRELIMINARY