Pioneer DV-S755AI Service Manual page 142

1
Pin Name
A
MCIF_INTZ
MCIF_MODE0
MCIF_MODE1
MCIF_MODE2
MCIF_OEZ
B
MCIF_RW
MCIF_STRBZ
C
MCIF_WAIT
D
MCIF_WEZ
E
Universal Asynchronous Receiver Transmitter Pins
UART_RxD
UART_TxD
F
142
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2
Pin No I/O Description
89 O MCIF Interrupt. This signal is push-pull. (always asserted) It
does not require a pull-up resistor.
133 I MCIF Mode 0. Used to select MCIF mode.
134 I MCIF Mode 1. Used to select MCIF mode.
135 I MCIF Mode 2. Used to select MCIF mode.
96 I MCIF Output Enable. Default active low. This input pin
indicates if the system CPU wants to perform a MCIF read
access. This signal is used for the following modes:
•
•
•
This signal should be tied high if not used.
92 I MCIF Read/Write pin. Default value for read is a logical 1.
Default value for write is a logical 0.
In Serial MCIF Mode, this pin is used for the Serial Write Data
(SMCIF_WDATA.)
93 I MCIF Strobe pin. Default active low. This pin is used (along
with MCIF_CS_IOZ) to validate the MCIF access. This signal
is used for the following modes:
•
•
•
In Serial MCIF Mode, this pin is used for the Serial Read
Clock (SMCIF_RCLK.)
94 O MCIF Wait pin. Default active high. iceLynx-Micro asserts
this signal if it is not ready to service an MCIF request. When
not asserted, this signal is in high-Z state. This signal is used
for the following modes:
•
•
•
In Serial MCIF Mode, this pin is used for the Serial Read
Request (SMCIF_RREQZ.)
97 I MCIF Write Enable. Default active low. This input pin
indicates if the system CPU wants to perform a MCIF write
access. This signal is used for the following modes:
•
•
•
This signal should be tied high if not used.
86 I UART receive port. Data from the system is input to the
UART buffer using this pin.
85 O UART transmit port. Data from the UART buffer is output to
the system using this pin.
DV-757Ai
2
3
SH-3 I/O Access
M16C/62 I/O Access
Memory Access
68000 + Wait I/O Access
MPC850 I/O Access
When not used, this pin should be tied high.
68000 + Wait I/O Access
SH-3 I/O Access
M16C/62 I/O Access
SH-3 I/O Access
M16C/62 I/O Access
Memory Access
3
4
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