dsp56800eerm Freescale Semiconductor, Inc, dsp56800eerm Datasheet - Page 29

• Manufacturer Part Number: dsp56800eerm
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
Preliminary
PHASEA0
PHASEB0
(GPIOC4)
(GPIOC5)
Signal
Name
TRST
(TA0)
(TA1)
Table 2-2 Signal and Package Information for the 160-Pin LQFP and MBGA
136
155
156
Pin
No.
Ball No.
D9
A2
B4
Schmitt
Schmitt
Schmitt
Schmitt
Schmitt
Schmitt
Schmitt
Output
Output
Output
Output
Input/
Input/
Input/
Input/
Type
Input
Input
Input
56F8357 Technical Data, Rev. 15
Input, pulled
internally
enabled
enabled
During
pull-up
pull-up
Reset
Input,
Input,
State
high
Test Reset — As an input, a low signal on this pin provides a
reset signal to the JTAG TAP controller. To ensure complete
hardware reset, TRST should be asserted whenever RESET is
asserted. The only exception occurs in a debugging
environment when a hardware device reset is required and the
JTAG/EOnCE module must not be reset. In this case, assert
RESET, but do not assert TRST.
To deactivate the internal pull-up resistor, set the JTAG bit in
the SIM_PUDR register.
Note:
design is to be used in a debugging environment, TRST may be tied
to V
Phase A — Quadrature Decoder 0, PHASEA input
TA0 — Timer A, Channel 0
Port C GPIO — This GPIO pin can be individually
programmed as an input or output pin.
After reset, the default state is PHASEA0.
To deactivate the internal pull-up resistor, clear bit 4 of the
GPIOC_PUR register.
Phase B — Quadrature Decoder 0, PHASEB input
TA1 — Timer A ,Channel
Port C GPIO — This GPIO pin can be individually
programmed as an input or output pin.
After reset, the default state is PHASEB0.
To deactivate the internal pull-up resistor, clear bit 5 of the
GPIOC_PUR register.
SS
through a 1K resistor.
For normal operation, connect TRST directly to V
Signal Description
Signal Pins
SS
. If the
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