Z85C3008VSG Zilog, Z85C3008VSG Datasheet - Page 90

• 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
Modem Controls. Up to two modem control signals asso-
ciated with the receiver are available in Synchronous
modes: /DTR//REQ and /DCD. The /DTR//REQ pin carries
the inverted state of the DTR bit (D7) in WR5 unless this
pin has been programmed to carry a DMA Request on
Transmit signal. The /DCD pin is ordinarily a simple input
to the DCD bit in RR0. However, if the Auto Enables mode
is selected by setting D5 of WR3 to 1, this pin becomes an
enable for the receiver. Therefore, if Auto Enables is ON
and the /DCD pin is High, the receiver is disabled; while
the /DCD pin is Low, the receiver is enabled.
Note that with Auto Enables mode enabled, when /DCD
goes inactive, the receiver stops immediately and the
character being assembled is lost.
Initialization. The initialization sequence for the receiver
in character-oriented mode is WR4 first, to select the
mode, then WR10 to modify it if necessary; WR6 and WR7
to program the sync characters; WR3 and WR5 to select
the various options. At this point the other registers are ini-
tialized as necessary. When all this is completed, the re-
ceiver is enabled by setting bit D0 of WR3 to a one. A sum-
mary is shown in Table 4-8. A detailed example of using
the SCC in 16-bit sync mode is available in the application
note “SCC in Binary Synchronous Communications.”
SCC™/ESCC™ User’s Manual
Data Communication Modes
4-15
4