Parameter Values - NXP Semiconductors MPC5644A Reference Manual

Nexus Port Controller (NPC)
— The Nexus block reset is controlled with JCOMP, power-on reset, and the TAP state machine.
All theses sources are independent of system reset
— Power-on-reset status indication during reset via MDO[0] in disabled and reset modes
• As some of the pads used for the Nexus interface are multi-voltage pads, the maximum supported
interface frequency is limited to 40 MHz in some modes. This corresponds to a MCKO clock
divider of 1/2 for system clocks up to 80 MHz, and 1/4 for system clocks > 80 MHz.
• Nexus Double Data Rate (DDR) mode is not available in the MPC5644A family of devices.
• A control bit in the Nexus port controller, NP_PCR[NEXCFG], is used to control whether the
added signals for full width trace port are routed to the MDO[4:11] signals, or the
CAL_MDO[4:11] signals. Although the CAL_MDO[4:11] signals are only available in the 496
CSP package, this control bit still needs to be programmed when the device is assembled in any
other package.
Table 37-1 shows the maximum trace port frequencies supported in different configurations, as
well as the operation of the NPC_PCR[FPM] and [NEXCFG] control bits.
Max.
trace
Package
port
MHz
Production 80
(176QFP,
208BGA,
40
324BGA)
Debug/Cal 80
package
(496 CSP)
40
80
37.1.2

Parameter values

Parameter
RPM_MDO (R)
NUM_AUX (X)
NUM_BKPT (B)
1672
Table 37-1. Nexus trace port routing and speed
Port width Port routing bit
NPC_PCR[FPM] NPC_PCR[NEXCFG]
4 MDO Don't care
(Narrow, FPM=0)
12 MDO NEXCFG = 1
(Wide, FPM=1)
4 MDO Don't care
(Narrow, FPM=0)
12 MDO NEXCFG = 1
(Wide, FPM=1) Use MDO
NEXCFG = 0
(Default setting)
Use CAL_MDO
Table 37-2. Parameter values
NPC parameters
Number of MDO pins available in reduced-port mode
Number of Nexus devices on the device sharing the
Nexus auxiliary port (not including the NPC)
Number of breakpoint requests coming into the block
from Nexus and non-Nexus sources on the device
MPC5644A Microcontroller Reference Manual, Rev. 6
MDO[0:3] MDO[4:11]
usage usage
Trace port I/O use
use
Trace port
use
I/O use
Trace port
use
I/O use
Description
CAL_MDO[4:11]
usage
Inactive
Trace port use
Trace port use
Value
4
1
1
Freescale Semiconductor