Z85C3008VSG Zilog, Z85C3008VSG Datasheet - Page 192

• Manufacturer Part Number: Z85C3008VSG
• Description: IC 8MHZ Z8500 CMOS SCC 44-PLCC
• Manufacturer: Zilog
• Series: SCCr

Specifications of Z85C3008VSG

• Processor Type: Z80
• Features: Error Detection and Multiprotocol Support
• Speed: 8MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Cpu Speed: 8MHz
• Digital Ic Case Style: LCC
• No. Of Pins: 44
• Supply Voltage Range: 5V
• Operating Temperature Range: 0°C To +70°C
• Svhc: No SVHC (18-Jun-2010)
• Base Number: 85
• Rohs Compliant: Yes
• Clock Frequency: 8MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-3932; Z85C3008VSG

UM010901-0601
First, this program (Table 14) initializes the SCC by:
Then, it initializes 4K bytes of memory with a repeating
pattern beginning with 00h and increases by one to FFh
(uses this as Tx buffer area). Also, it begins another 4K
bytes of memory as a Rx buffer with all zeros. After
starting, DMA initialization follows:
DMAC0: For Rx data transfer: I/O to Mem, Source
address- fixed, Destination address-increasing. Edge
sense mode: Interrupt on end of transfer.
CONCLUSION
This Application Note describes only one example of
implementation, but gives you an idea of how to design the
system using the Z180™ and SCC.
Async, X1 mode, 8-bit 1 stop, Non-parity.
Tx and Rx clock from BRG, and BRG set to
PCLK/4.Self Loopback
DMAC1: For Tx data transfer: Mem to I/O, Source
address-increasing, Destination address - fixed. Edge
sense mode: Interrupt on end of transfer.
Now, start sending with DMA.
On completion of the transfer, the Z180 DMAC1 generates
an interrupt. Then, wait for the interrupt from DMAC0
which shows an end of receive. Now, compare received
data with sent data. If the transfer was successful (source
data matched with destination), 00h is left in the
accumulator. If not successful, 0FFh is left in the
accumulator.
This program example specifies a way to initialize the SCC
and the Z180 DMA.
For further design assistance, a completed board together
with the Debug/Monitor program and the listed sample
program are available. If interested, please contact your
local Zilog sales office.
The Z180™ Interfaced with the SCC at MHZ
Application Note
6-57
7