參數(shù)資料
型號: 9202
廠商: 意法半導(dǎo)體
英文描述: Flash Programmable System Devices with 8032 Microcontroller Core
中文描述: 閃存可編程系統(tǒng)設(shè)備與8032微控制器內(nèi)核
文件頁數(shù): 122/175頁
文件大?。?/td> 1731K
代理商: 9202
UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
122/175
Complex PLD (CPLD)
The CPLD can be used to implement system logic
functions, such as loadable counters and shift reg-
isters, system mailboxes, handshaking protocols,
state machines, and random logic. The CPLD can
also be used to generate External Chip Select
(ECS1-ECS2), routed to Port D.
Although External Chip Select (ECS1-ECS2) can
be produced by any Output Macrocell (OMC),
these External Chip Select (ECS1-ECS2) on Port
D do not consume any Output Macrocells (OMC).
As shown in Figure 58, the CPLD has the following
blocks:
I
20 Input Macrocells (IMC)
I
16 Output Macrocells (OMC)
I
Macrocell Allocator
I
Product Term Allocator
I
AND Array capable of generating up to 137
product terms
I
Four I/O Ports.
Each of the blocks are described in the sections
that follow.
The Input Macrocells (IMC) and Output Macrocells
(OMC) are connected to the PSD MODULE inter-
nal data bus and can be directly accessed by the
MCU. This enables the MCU software to load data
into the Output Macrocells (OMC) or read data
from both the Input and Output Macrocells (IMC
and OMC).
This feature allows efficient implementation of sys-
tem logic and eliminates the need to connect the
data bus to the AND Array as required in most
standard PLD macrocell architectures.
Figure 60. Macrocell and I/O Port
I/O PORTS
CPLD MACROCELLS
INPUT MACROCELLS
LATCHED
ADDRESS OUT
MUX
M
M
M
M
D
D
Q
Q
Q
G
D
Q D
WR
WR
PDR
DATA
PALLOCATOR
DIR
SELECT
INPUT
PFROM OTHER
MACROCELLS
POLARITY
PROUP TO 10
CLOCK
PR
DI LD
D/T
CK
CL
Q
SELECT
PT CLEAR
PT
GLOBAL
PT OUTPUT ENABLE (OE)
MACROCELL FEEDBACK
I/O PORT INPUT
ALE
PT INPUT LATCH GATE/CLOCK
MCU LOAD
PT PRESET
MCU DATA IN
/REG
SELECT
MACTO
IALLOC.
OCPLD
TO OTHER I/O PORTS
P
P
MCU ADDRESS / DATA BUS
MOUT TO
MCU
CDATA
A
CPLD OUTPUT
I/O PIN
AI06602
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