Z8S18033VSG Zilog, Z8S18033VSG Datasheet - Page 173
![IC 33MHZ STATIC Z180 68-PLCC](/photos/6/71/67199/269-68-plcc_sml.jpg)
Z8S18033VSG
Manufacturer Part Number
Z8S18033VSG
Description
IC 33MHZ STATIC Z180 68-PLCC
Manufacturer
Zilog
Series
Z8018xr
Specifications of Z8S18033VSG
Processor Type
Z180
Features
Enhanced Z180
Speed
33MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
68-LCC (J-Lead)
Core Size
8bit
Cpu Speed
33MHz
Digital Ic Case Style
PLCC
No. Of Pins
68
Supply Voltage Range
4.5V To 5.5V
Operating Temperature Range
0°C To +70°C
Svhc
No SVHC (18-Jun-2010)
Rohs Compliant
Yes
Processor Series
Z8S180X
Core
Z80
Data Bus Width
8 bit
Maximum Clock Frequency
33 MHz
Number Of Timers
2
Operating Supply Voltage
0 V to 3.3 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Development Tools By Supplier
Z8S18000ZEM
Minimum Operating Temperature
0 C
Base Number
8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
269-4307
Q2431383
Z8S18033VSG
Q2431383
Z8S18033VSG
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UM005003-0703
Z8018x
Family MPU User Manual
return accurate data without requiring the timer to be stopped. The write
procedure requires the PRT to be stopped.
For reading (without stopping the timer), TMDR is read in the order of
lower byte - higher byte (TMDRnL, TMDRnH). The lower byte read
(TMDRnL) stores the higher byte value in an internal register. The
following higher byte read (TMDRnH) accesses this internal register.
This procedure insures timer data validity by eliminating the problem of
potential 16-bit timer updating between each 8-bit read. Specifically,
reading TMDR in higher byte–lower byte order may result in invalid data.
Note the implications of TMDR higher byte internal storage for
applications which may read only the lower and/or higher bytes. In
normal operation all TMDR read routines must access both the lower and
higher bytes, in that order. For writing, the TMDR down counting must be
inhibited using the TDE (Timer Down Count Enable) bits in the TCR
(Timer Control Register). Then, any or both higher and lower bytes of
TMDR can be freely written (and read) in any order.
CSI/O Transmit/Receive Data Register (TRDR: I/O
Address = 0BH).
TRDR is used for both CSI/O transmission and reception. Thus, the
system design must insure that the constraints of half-duplex operation
are met (Transmit and receive operation cannot occur simultaneously).
For example, if a CSI/O transmission is attempted while the CSI/O is
receiving data, the CSI/O does not work.
TRDR is not buffered. Attempting to perform a CSI/O transmit while the
previous transmit data is still being shifted out causes the shift data to be
immediately updated, thereby corrupting the transmit operation in
progress. Similarly, reading TRDR during a transmit or receive must be
avoided.
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