Z16C3516VSG Zilog, Z16C3516VSG Datasheet - Page 122

• Manufacturer Part Number: Z16C3516VSG
• Description: IC 16MHZ Z8500 CMOS ISCC 68-PLCC
• Manufacturer: Zilog
• Series: IUSC™r

Specifications of Z16C3516VSG

• Controller Type: Serial Communications Controller (SCC)
• Interface: USB
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 50mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 68-LCC (J-Lead)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-4690-5; Z16C3516VSG

Application Note
The Z180™ Interfaced with the SCC at MHZ
INTERFACES
The following subsections explain the interfaces between
the:
Basic goals of this system design are:
7-2
Z180 and Memory
Z180 and I/O
Z180 and SCC
System clock up to 10 MHz
Using the Z8018010VSC (Z180 10 MHz PLCC
package) to take advantage of 1M byte addressing
space and compactness (DIP versions’ addressing
range is half; 512K bytes)
Using Z85C3010VSC (CMOS SCC 10 MHz PLCC
package)
Minimum parts count
Worst case design
8-2
Address
/MREQ
Data
/RD
/M1
Ø
Figure 1. Z180 Opcode Fetch Cycle Timing (One Wait State)
T1
6
10
8
9
T2
7
The design method for EPLD is using TTLs (74HCT) and
then translating them into EPLD logic. This design uses
TTLs and EPLDs. With these goals in mind, the discussion
begins with the Z180-to-memory interface.
Z180 to Memory Interface
The memory access cycle timing of the Z180 is similar to
the Z80 CPU memory access cycle timing. The three
classifications are:
Table 1 shows the Z180’s basic timing elements for the
opcode’s fetch/memory read/write cycle.
Tw
Using EPLD for glue wherever possible
Expendability
Opcode fetch cycle (Figure 1)
Memory read cycle (Figure 2)
Memory write cycle (Figure 3)
Read Data
T3
14
15
12
13
T1
11
11
16
UM011001-0601