Z80C3008VSC Zilog, Z80C3008VSC Datasheet - Page 32

• Manufacturer Part Number: Z80C3008VSC
• Description: IC 8MHZ CMOS Z8000 SCC 44-PLCC
• Manufacturer: Zilog

Specifications of Z80C3008VSC

• Controller Type: Serial Communications Controller (SCC)
• Interface: Bus
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 4mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PS011705-0608
Z80C30
Z85C30/Z80C30 Setup
All SCC registers are directly addressable. A command issued in WR0B controls how the
SCC decodes the address placed on the address/data bus at the beginning of a Read or
Write cycle. In the Shift Right mode, the channel select A/B is taken from AD0 and the
state of AD5 is ignored. In the Shift Left mode, the channel select A/B is taken from AD5
and the state of AD0 is ignored. AD7 and AD6 are always ignored as address bits and the
register address occupies AD4-AD1.
Initialization
The system program first issues a series of commands to initialize the basic mode of
mode. For example, in the Asynchronous mode, character length, clock rate, number of
stop bits, and even or odd parity must be set first. The interrupt mode is set, and finally, the
receiver and transmitter are enabled.
Write Registers
The SCC contains 15 Write registers for the 80C30, while there are 16 for the 85C30 (one
more additional Write register if counting the transmit buffer) in each channel. These
Write registers are programmed separately to configure the functional ‘personality’ of the
channels. There are two registers (WR2 and WR9) shared by the two channels that are
accessed through either of them. WR2 contains the interrupt vector for both channels,
while WR9 contains the interrupt control bits and reset commands.
Figure 18
operation. This is followed by other commands to qualify conditions within the selected
display the format of each Write register.
CMOS SCC Serial Communications Controller
Product Specification
Figure 15
Functional Description
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