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參數(shù)資料
| 型號： | SAA2022GP |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | Tape formatting and error correction for the DCC system |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | PLASTIC, SOT-208A, QFP-64 |
| 文件頁數(shù)： | 22/52頁 |
| 文件大?。?/td> | 208K |
| 代理商： | SAA2022GP |
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February 1994
22
Philips Semiconductors
Product specification
Tape formatting and error
correction for the DCC system
SAA2022
Programming the SAA2022 via the Microcontroller Interface
Table 1
SAA2022 interface connections to the microcontroller.
All transfers are in units of 8-bits, registers with less than 8-bits are LSB justified, unless otherwise specified. The four
basic types of transfer are shown in Table 2.
Table 2
Types of transfer.
Microcontroller Interface Registers
The SAA2022 microcontroller interface has 7 write and 4 read registers, as shown in Table 3.
Table 3
SAA2022 Microcontroller Interface Registers.
PIN
INPUT/OUTPUT
DESCRIPTION
LTEN
I
enable active HIGH
LTCLK
I
clock signal
LTCNT0
I
control LSB
LTCNT1
I
control MSB
LTDATA
I/O
bi-directional data
LTREF
O
timing reference 5
μ
s at start of every segment active LOW
LTCNT1
LTCNT0
TRANSFER
EXPLANATION
0
0
WDAT
write DATA to SAA2022
0
1
RDAT
read DATA from SAA2022
1
0
WCMD
write Command to SAA2022
1
1
RSTAT
read Status from SAA2022
REGISTER
READ/WRITE
NO. OF BITS
COMMENTS
SET0
WRITE
7
primary settings
SET1
WRITE
8
secondary settings
CMD
WRITE
6
microcontroller command
BYTCNT
WRITE
8
byte counter
RACCNT
WRITE
7
random access counter
SPDDTY
WRITE
8
duty cycle for SPEED
AFLEV
WRITE
4
AUXILIARY flag level
STATUS0
READ
8
primary status
STATUS1
READ
7
secondary status
STATUS2
READ
8
SYSINFO/AUX flags
STATUS3
READ
8
channel status flags
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