参数资料
型号: COP8SGB828L8
厂商: National Semiconductor Corporation
英文描述: 8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART
中文描述: 8位的CMOS基于ROM和OTP微控制器具有8K到32K的内存,2个比较器和USART
文件页数: 21/62页
文件大小: 913K
代理商: COP8SGB828L8
5.0 Functional Description
(Continued)
5.11 CONTROL REGISTERS
CNTRL Register (Address X'00EE)
T1C3
Bit 7
T1C2
T1C1
T1C0
MSEL
IEDG
SL1
SL0
Bit 0
The Timer1 (T1) and MICROWIRE/PLUS control register
contains the following bits:
T1C3
Timer T1 mode control bit
T1C2
Timer T1 mode control bit
T1C1
Timer T1 mode control bit
T1C0
Timer T1 Start/Stop control in timer
modes 1 and
Pending Flag in timer mode 3
MSEL
Selects G5 and G4 as MICROWIRE/PLUS
signals SK and SO respectively
IEDG
External interrupt edge polarity select
(0 = Rising edge, 1 = Falling edge)
SL1 & SL0 Select the MICROWIRE/PLUS clock divide
by (00 = 2, 01 = 4, 1x = 8)
2,
T1
Underflow
Interrupt
PSW Register (Address X'00EF)
HC
Bit 7
C
T1PNDA
T1ENA
EXPND
BUSY
EXEN
GIE
Bit 0
The PSW register contains the following select bits:
HC
Half Carry Flag
C
Carry Flag
T1PNDA Timer T1 Interrupt Pending Flag (Autoreload RA
in mode 1, T1 Underflow in Mode 2, T1Acapture
edge in mode 3)
T1ENA
Timer T1 Interrupt Enable for Timer Underflow
or T1A Input capture edge
EXPND
External interrupt pending
BUSY
MICROWIRE/PLUS busy shifting flag
EXEN
Enable external interrupt
GIE
Global interrupt enable (enables interrupts)
The Half-Carry flag is also affected by all the instructions that
affect the Carry flag. The SC (Set Carry) and R/C (Reset
Carry) instructions will respectively set or clear both the carry
flags. In addition to the SC and R/C instructions, ADC,
SUBC, RRC and RLC instructions affect the Carry and Half
Carry flags.
ICNTRL Register (Address X'00E8)
Reserved
LPEN
T0PND
T0EN μWPND
μWEN
T1PNDB
T1ENB
Bit 7
Bit 0
The ICNTRL register contains the following bits:
Reserved This bit is reserved and must be zero
LPEN
L
Port
Wakeup/Interrupt)
T0PND
Timer T0 Interrupt pending
T0EN
Timer T0 Interrupt Enable (Bit 12 toggle)
μWPND
MICROWIRE/PLUS interrupt pending
μWEN
Enable MICROWIRE/PLUS interrupt
T1PNDB Timer T1 Interrupt Pending Flag for T1B cap-
ture edge
T1ENB
Timer T1 Interrupt Enable for T1B Input capture
edge
Interrupt
Enable
(Multi-Input
T2CNTRL Register (Address X'00C6)
T2C3
T2C2
T2C1
T2C0
T2PNDA
T2ENA
T2PNDB
T2ENB
Bit 7
Bit 0
The T2CNTRL control register contains the following bits:
T2C3
Timer T2 mode control bit
T2C2
Timer T2 mode control bit
T2C1
Timer T2 mode control bit
T2C0
Timer
T2
Start/Stop
modes 1 and 2, T2 Underflow Interrupt Pend-
ing Flag in timer mode 3
T2PNDA Timer T2 Interrupt Pending Flag (Autoreload
RA in mode 1, T2 Underflow in mode 2, T2A
capture edge in mode 3)
T2ENA
Timer T2 Interrupt Enable for Timer Underflow
or T2A Input capture edge
T2PNDB Timer T2 Interrupt Pending Flag for T2B cap-
ture edge
T2ENB
Timer T2 Interrupt Enable for Timer Underflow
or T2B Input capture edge
control
in
timer
10131719
FIGURE 13. External Oscillator
10131720
For operation at lower than maximum R/C oscillator frequency.
10131721
For operation at maximum R/C oscillator frequency.
FIGURE 14. R/C Oscillator
C
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