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| 型號： | SAA5297AH |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Economy teletext and TV microcontrollers |
| 中文描述： | 經(jīng)濟(jì)圖文電視和電視微控制器 |
| 文件頁數(shù)： | 19/68頁 |
| 文件大?。?/td> | 612K |
| 代理商： | SAA5297AH |
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1997 Jul 07
19
Philips Semiconductors
Preliminary specification
Economy teletext and TV microcontrollers
SAA5x9x family
7.4.2
S
PECIAL
F
UNCTION
R
EGISTERS BIT DESCRIPTIONS
Table 11
SFRs bit description
REGISTER
FUNCTION
Interrupt Enable Register (IE)
EA
ES1
ES2
ET1
EX1
ET0
EX0
disable all interrupts (logic 0) or use individual interrupt enable bits (logic 1)
bit I
2
C-bus interrupt enable (logic 1)
byte I
2
C-bus interrupt enable (logic 1)
enable timer 1 overflow interrupt (logic 1)
enable external interrupt 1 (logic 1)
enable timer 0 overflow interrupt (logic 1)
enable external interrupt 0 (logic 1)
Power Control Register (PCON)
ARD
AUX-RAM disable bit. Disables the 512 bytes of internal AUX-RAM (logic 1);
all MOVX-instructions access the external data memory
general purpose flag 1
general purpose flag 0
GF1
GF0
Program Status Word (PSW)
CY
AC
F0
RS1,RS0
OV
P
carry flag
auxiliary carry flag
flag 0
register bank select control bits
overflow flag
parity flag
6-bit Pulse Width Modulator Control Registers (PWM0 to PWM7)
PWE
PV5 to PV0
activate this PWM and take control of respective port pin (logic 1)
binary value sets high time of PWM output
Serial Interface Slave Address Register (S1ADR);
note 1
I
2
C-bus slave address to which the device will respond
GC
enables response to the I
2
C-bus general call address
ADR6 to ADR0
Serial Interface Control Register (S1CON);
note 1
CR2 to CR0
ENSI
STA
STO
SI
AA
clock rate bits
I
2
C-bus interface enable
start condition flag
stop condition flag
interrupt flag
assert acknowledge flag
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