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| 型號(hào)： | MC68CK338CPV14B1 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 14.4 MHz, MICROCONTROLLER, PQFP144 |
| 封裝： | TQFP-144 |
| 文件頁(yè)數(shù)： | 128/133頁(yè) |
| 文件大?。?/td> | 817K |
| 代理商： | MC68CK338CPV14B1 |
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MOTOROLA
MC68CK338
94
MC68CK338TS/D
NOTE
All of the functions associated with one pin are called a SASM channel.
The SASM can perform a single timing action (input capture or output compare) before software inter-
vention is required. Each channel includes a 16-bit comparator and one 16-bit register for saving an in-
put capture value or for holding an output compare value. The input edge detector associated with each
pin is programmable to cause the capture function to occur on the rising or falling edge. The output flip
flop can be set to either toggle when an output compare occurs or to transfer a software-provided bit
value to the output pin. In either input capture or output compare mode, each channel can be pro-
grammed to generate an interrupt. One of the two incoming time-base buses may be selected for each
channel. Each channel can also work as a simple I/O pin.
A total of four SASMs (eight channels) are contained in the CTM6. Figure 22 shows a block diagram
of the SASM.
Figure 22 SASM Block Diagram
6.9.1 SASM Registers
The SASM contains two status/interrupt/control registers (A and B) and two data registers (A and B).
All unused bits and reserved address locations return zero when read. Writing to unused bits and
reserved address locations has no effect. The CTM6 contains four SASMs, each with its own set of reg-
isters.
SIC12A, SIC14A — SASM Status/Interrupt/Control Register A
$YFF460, $YFF470
SIC18A, SIC24A — SASM Status/Interrupt/Control Register A
$YFF490, $YFF4C0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
FLAG
IL[2:0]
IARB3
IEN
0
BSL
IN
0
FORCE EDOUT
0
MODE[1:0]
RESET:
0
U
0
I/O PIN
CTM SASM BLOCK
SINGLE ACTION CHANNEL A
CTM TIME BASE BUSES
SUBMODULE BUS
SINGLE ACTION CHANNEL B
INTERRUPT CONTROL
IL2
IL0
IARB3
FLAG
IEN
IL1
FLAG
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