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DFPIC1655X Datasheet(PDF) 5 Page - Digital Core Design

Part # DFPIC1655X
Description  High Performance Configurable 8-bit RISC Microcontroller
Download  7 Pages
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Manufacturer  DCD [Digital Core Design]
Direct Link  http://www.digitalcoredesign.com
Logo DCD - Digital Core Design

DFPIC1655X Datasheet(HTML) 5 Page - Digital Core Design

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All trademarks mentioned in this document
are trademarks of their respective owners.
Copyright 1999-2007 DCD – Digital Core Design. All Rights Reserved.
http://www.DigitalCoreDesign.com
http://www.dcd.pl
I/O Ports
– Block contains DFPIC1655X’s
general purpose I/O ports and data direction
registers (TRIS). The DFPIC1655X has two 8-
bit full bi-directional ports PORT A, PORT B.
Read and write accesses to the I/O port are
performed via their corresponding SFR’s
PORTA, PORTB. The reading instruction al-
ways reads the status of Port pins. Writing
instructions always write into the Port latches.
Each port’s pin has an corresponding bit in
TRISA and TRISB registers. When the bit of
TRIS register is set this means that the corre-
sponding bit of port is configured as an input
(output drivers are set into the High Imped-
ance).
DoCD™ Debug Unit
– it’s a real-time hard-
ware debugger provides debugging capability
of a whole SoC system. In contrast to other
on-chip debuggers DoCD™ provides non-
intrusive debugging of running application. It
can halt, run, step into or skip an instruction,
read/write any contents of microcontroller in-
cluding all registers, internal, external, pro-
gram memories, all SFRs including user de-
fined peripherals. Hardware breakpoints can
be set and controlled on program memory,
internal and external data memories, as well
as on SFRs. Hardware breakpoint is executed
if any write/read occurred at particular address
with certain data pattern or without pattern.
The DoCD™ system includes three-wire inter-
face and complete set of tools to communi-
cate and work with core in real time debug-
ging. It is built as scalable unit and some fea-
tures can be turned off to save silicon and
reduce power consumption. A special care on
power consumption has been taken, and
when debugger is not used it is automatically
switched in power save mode. Finally whole
debugger is turned off when debug option is
no longer used.
OPTIO N AL M O DULES
There are also available an optional pe-
ripherals,
not
included
in
presented
DFPIC1655X Microcontroller Core. The op-
tional peripherals, can be implemented in mi-
crocontroller core upon customer request.
Full duplex UART
SPI – Master and Slave Serial Peripheral
Interface
PWM – Pulse Width Modulation Timer
I2C bus controller – Master / Slave
PERFORMANCE
The following table gives a survey about
the Core area and performance in the
ALTERA® devices after Place & Route:
Device
Speed
grade
Logic Cells
Fmax
CYCLONE
-6
660
99 MHz
CYCLONE II
-6
663
91 MHz
STRATIX
-5
661
106 MHz
STRATIX II
-3
591
122 MHz
STRATIX GX
-5
661
101 MHz
APEX II
-7
804
71 MHz
APEX20KC
-7
739
61 MHz
APEX20KE
-1
739
56 MHz
APEX20K
-1
739
50 MHz
ACEX1K
-1
804
39 MHz
FLEX10KE
-1
804
38 MHz
Core performance in ALTERA® devices
IMPROVEMENT
Most instruction of DFPIC1655X is exe-
cuted within 2 CLK cycles. Except the condi-
tional program memory branches in case that
the condition of branch instruction is met. The
table below shows sample instructions execu-
tion times:
Mnemonic
operands
DFPIC1655X
(CLK cycles)
PIC16C554
(CLK cycles)
Impr.
ADDWF
2
4
2
ANDWF
2
4
2
RLF
2
4
2
BCF
2
4
2
DECFSZ
2(4)1
4(8)1
2
INCFSZ
2(4)1
4(8)1
2
BTFSC
2(4)1
4(8)1
2
BTFSS
2(4)1
4(8)1
2
CALL
2
8
4
GOTO
2
8
4
RETFIE
2
8
4
RETLW
2
8
4
RETURN
2
8
4
1
number of clock in case that result of
operation is 0.


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