Texas Instruments RM48 series, Technical Reference Manual

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Control Registers
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1730 SPNU503C – March 2018
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RAM Trace Port (RTP)
31.4.14 RTP Pin Control 6 Register (RTPPC6)
These bits configure the pins in push-pull or open-drain functionality. If configured to be open-drain, the
module only drives a logic low level on the pin. An external pull-up resistor needs to be connected to the
pin to pull it high when the pin is in high-impedance mode.
Figure 31-22 and Table 31-22 illustrate this
register.
Figure 31-22. RTP Pin Control 6 Register (RTPPC6) [offset = 4Ch]
31 19 18 17 16
Reserved ENAPDR CLKPDR SYNCPDR
R-0 R/W-0 R/W-0 R/W-0
15 0
DATAPDR[15:0]
R/W-0
LEGEND: R/W = Read/Write; R = Read only; - n = value after reset
Table 31-22. RTP Pin Control 6 Register (RTPPC6) Field Descriptions
Bit Field Value Description
31-19 Reserved 0 Read returns 0. Writes have no effect.
18 ENAPDR RTPENA Open drain enable. This bit enables open-drain functionality on the pin if it is configured as
GIO output (RTPPC0[18]=0; RTPPC1[18]=1). If the pin is configured as a functional pin
(RTPPC0[18]=1), the open-drain functionality is disabled.
User and privilege mode (read):
0 Pin behaves as normal push/pull pin.
1 Pin operates in open drain mode.
User and privilege mode (write):
0 Configures the pin as push/pull.
1 Configures the pin as open drain.
17 CLKPDR RTPCLK Open drain enable. This bit enables open-drain functionality on the pin if it is configured as
GIO output (RTPPC0[17]=0; RTPPC1[17]=1). If the pin is configured as functional pin (RTPPC0[17]=1),
the open-drain functionality is disabled.
User and privilege mode (read):
0 Pin behaves as normal push/pull pin.
1 Pin operates in open drain mode.
User and privilege mode (write):
0 Configures the pin as push/pull.
1 Configures the pin as open drain.
16 SYNCPDR RTPSYNC Open drain enable. This bit enables open-drain functionality on the pin if it is configured as
GIO output (RTPPC0[16]=0; RTPPC1[16]=1). If pin is configured as functional pin (RTPPC0[16]=1), the
open-drain functionality is disabled.
User and privilege mode (read):
0 Pin behaves as normal push/pull pin.
1 Pin operates in open drain mode.
User and privilege mode (write):
0 Configures the pin as push/pull.
1 Configures the pin as open drain.