參數(shù)資料
型號(hào)： Z8018520FSC
廠商： ZILOG INC
元件分類： 微控制器/微處理器
英文描述： SMART PERIPHERAL CONTROLLERS
中文描述： MICROCONTROLLER, PQFP100
封裝： PLASTIC, QFP-100
文件頁數(shù)： 66/95頁
文件大?。?/td> 484K
代理商： Z8018520FSC
66
P R E L I M I N A R Y
Z80185/Z80195
S
MART
P
ERIPHERAL
C
ONTROLLERS
DS971850301
Zilog
Bidirectional Centronics Registers
Reading the Parallel Controls (PARC) register allows soft-
ware to sense the state of the input signals per the current
mode, plus two or three status flags:
Busy
PError
Select
nFault
nAck
IllOp
DREQ
Idle
7
6
5
4
3
2
1
0
The controller sets
IllOp
(Illegal Operation) when it detects
an error in the protocol, for example, if it’s in Peripheral
mode and it detects that the host has driven P1284Active
(nSelectIn) Low at a time that mandates an immediate
Abort, that is, outside one of the “windows” in which this
event indicates an organized disengagement. If “status
interrupts” are enabled, such an interrupt is always re-
quested when
IllOp
is set. Writing PARM with NewMode=1
clears
IllOp
.
DREQ is the Request presented to the DMA channels,
which may or may not be programmed to service this
request. If not, an interrupt can be enabled when DREQ is
set.
Writing to PARC allows the software to set and clear the
output signals per the current mode:
7
6
5
4
3
2
1
0
1=drive
Busy
High
1=drive
PError
High
1=drive
Select
High
1=drive
nFault
High
1=drive
Busy
Low
1=drive
PError
Low
1=drive
Select
Low
1=drive
nFault
Low
7
6
5
4
3
2
1
0
1=drive
nAutoFd
High
1=drive
nStrobe
High
1=drive
nSelctIn
High
1=drive
nInit
High
1=drive
nAutoFd
Low
1=drive
nStrobe
Low
1=drive
nSelctIn
Low
1=drive
nInit
Low
Figure 75b. Writing to PARC in a Peripheral Mode
(I/O Address %DA)
Figure 75a. Writing to PARC in a Host Mode
(I/O Address %DA)
7
6
5
4
3
2
1
0
nAutoFd
nStrobe
nSlctIn
nInit
IllOp
DREQ
Idle
Figure 74b. Reading PARC in a Peripheral Mode
(I/O Address %DA)
Figure 74a. Reading PARC in a Host Mode
(I/O Address %DA)
相關(guān)PDF資料
PDF描述
Z80195 SMART PERIPHERAL CONTROLLERS
Z8019520FSC SMART PERIPHERAL CONTROLLERS
Z8018933FSC GENERAL-PURPOSE EMBEDDED CONTROLLERS
Z8L189 GENERAL-PURPOSE EMBEDDED CONTROLLERS
Z8L18920ASC GENERAL-PURPOSE EMBEDDED CONTROLLERS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
Z8018533FSC 制造商:ZILOG 制造商全稱:ZILOG 功能描述:SMART PERIPHERAL CONTROLLERS
Z80189 制造商:ZILOG 制造商全稱:ZILOG 功能描述:Z8018x Family MPU
Z8018933ASC 制造商:ZILOG 制造商全稱:ZILOG 功能描述:GENERAL-PURPOSE EMBEDDED CONTROLLERS
Z8018933FSC 制造商:ZILOG 制造商全稱:ZILOG 功能描述:GENERAL-PURPOSE EMBEDDED CONTROLLERS
Z8018X 制造商:ZILOG 制造商全稱:ZILOG 功能描述:Family MPU
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