Commodore 128 Programmer's Reference Manual page 621

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C128 HARDWARE SPECIFICATIONS 611
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6526 COMPLEX INTERFACE ADAPTER
(CIA) CHIP SPECIFICATIONS
DESCRIPTION
The 6526 Complex Interface Adapter (CIA) is an 8502 bus compatible peripheral
interface device with extremely flexible timing and I/O capabilities. Figure 16-19 shows
the 6526 pin configuration. Figure 16-20 shows the 6526 block diagram.
FEATURES
16 Individually programmable I/O lines
8 or 16-bit handshaking on read or write
2 independent, linkable 16-bit interval timers
24-hour (AM/PM) time of day clock with programmable alarm
8-bit shift register for serial I/O
2TTL load capability
CMOS compatible I/O lines
1 or 2 MHz operation available
ORDERING INFORMATION
MXS 6526
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/1
- FREQUENCY RANGE
NO SUFFIX =lMHz
A = 2MHz
PACKAGE DESIGNATOR
C = CERAMIC
P= PLASTIC
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