Z85C3008PSG Zilog, Z85C3008PSG Datasheet - Page 198

• Manufacturer Part Number: Z85C3008PSG
• Description: IC 8MHZ Z8500 CMOS SCC 40-DIP
• Manufacturer: Zilog
• Series: SCCr

Specifications of Z85C3008PSG

• Processor Type: Z80
• Features: Error Detection and Multiprotocol Support
• Speed: 8MHz
• Voltage: 5V
• Mounting Type: Through Hole
• Package / Case: 40-DIP (0.620", 15.75mm)
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Cpu Speed: 8MHz
• Digital Ic Case Style: DIP
• No. Of Pins: 40
• 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: 269-3930; Q2456016A; Z85C3008PSG

UM010901-0601
The three LSBs of the above MMCS values are 111 so that
the longest possible Reset pulse is generated when any of
the locations in the indicated range are accessed.
Note that if this feature is not needed, it can be disabled by
simply not programming the MMCS register.
This variability is provided in part because early versions
of the 85230 ESCC had trouble passing an interrupt
acknowledge down the daisy chain if it occurred in
RAM Size
32K x 8
128K x 8
To make the interrupt priority be:
(E)SCC highest, IUSC, ISCC, (M)USC lowest
IUSC highest, ISCC, MUSC, (E)SCC lowest
IUSC highest, ISCC, USC, (E)SCC lowest
MMCS value
Table 6. Address Ranges for Reset
DBFF
3BFF
Interrupt Daisy Chain (Priority) Order
Jumper block J25 selects whether the (E)SCC device is at
the start or the end of the interrupt daisy chain.
response to a lower-priority device’s request just as the
ESCC was starting to make its own request. Current
85230’s don’t have the problem.
Jumper J25 as follows:
J25-J2 to J25-J3, J25-J4 to J25-J5 (J25-J1, J25X open)
J25-J1 to J25-J2, J25-J to J25-J4 (J25-5J, J25X open)
J25X to J25-J2, J25-J3 to J25-J4 (J25-J1, J25-J5 open)
The Zilog Datacom Family with the 80186 CPU
Address Range for which ISCC,
IUSC, and (M)USC are Reset:
DB000-DB7FF
3B000-3B7FF
Application Note
6-63
8