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MMCCMB2103UM/D
User’s Manual
45
MAPI Connectors (P1/J1, P2/J2, P3/J3, P4/J4)
Table 4-3 MAPI Connector P3/J3 Signal Descriptions
Pin
Mnemonic
Signal
100, 99, 60, 59,
VDD3V
+3.3-volt power
98, 96, 94, 92,
90, 89, 78, 72,
70, 66, 64, 62, 58
— 56, 54 — 50,
48 — 44, 42 —
38, 36 — 32, 30
— 26, 22, 20
PTJ3[x]
Pass Through.
97, 95, 91, 81,
68, 65, 63, 61,
55, 49, 43, 31, 25
GND
GROUND
93
EXTAL
EXTERNAL CLOCK — Off-board clock signal.
88, 86
TSIZ[1], TSIZ[0]
TRANSFER SIZE (lines 1, 0) — Signals that indicate the size of an external bus
transfer.
87
TRST_b
TEST RESET – Active-low input signal to the Schmitt trigger, asynchronously
initializing the test controller.
85
TCLK
TEST CLOCK – Input signal that synchronizes the JTAG test logic. The TCK pin
has an internal pullup resistor.
84
DBEV_b
DEBUG EVENT – Open-drain, active-low debug signal. If an input signal from
an external command controller, causes the processor to enter debug mode. If
an output signal, acknowledges that the MCU is in debug mode.
83
TMS
TEST MODE SELECT – Input signal that sequences the JTAG test controller's
state machine, sampled on the rising edge of the TCK signal. The TMS pin has
an internal pullup resistor.
82
TDI
TEST DATA INPUT – Serial input signal for JTAG test instructions and data,
sampled on the rising edge of the TCK signal. The TDI pin has an internal
pullup resistor.
80
TDO
TEST DATA OUTPUT – Serial output signal for JTAG test instructions and data.
Tri-stateable and actively driven in the Shift-IR and Shift-DR controller states,
this signal changes on the falling edge of the TCK signal.
79
RSTOUT_b
RESET OUT – Active-low output signal, controlled by the processor, that resets
external components. Activation of any internal reset sources asserts this line.
77
RESET_b
RESET IN – Active-low input signal that starts a system reset: a reset of the
processor and most peripherals. This signal does not affect the debug module
(which the system provides via the TRST* line).
76, 37
IDVDD
IDENTIFICATION POWER — Special 3-volt power signal, from an external
source, for the identification code (MID) signals.
75
SHS
SHOW CYCLE STROBE — Output signal indicating that address and data are
valid.
74
VDD5V
+5-volt power.
73, 71, 69, 67
PSTAT[3] —
PSTAT[0]
PROCESSOR STATUS (lines 3—0) — Output signals that provide external
status indications for the resident MCU.
37
IDVDD
MID (identification code) lines 9—4 — Signals that identify the host processor
board.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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