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参数资料
型号： COP8SGE744V8XXX
厂商： NATIONAL SEMICONDUCTOR CORP
元件分类： 微控制器/微处理器
英文描述： 8-BIT, OTPROM, 15 MHz, MICROCONTROLLER, PQCC44
封装： PLASTIC, LCC-44
文件页数： 14/62页
文件大小： 840K
代理商： COP8SGE744V8XXX
5.0 Functional Description (Continued)
5.11 CONTROL REGISTERS
CNTRL Register (Address X'00EE)
T1C3
T1C2
T1C1
T1C0
MSEL
IEDG
SL1
SL0
Bit 7
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 2, T1 Underflow Interrupt
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)
PSW Register (Address X'00EF)
HC
C
T1PNDA
T1ENA
EXPND
BUSY
EXEN
GIE
Bit 7
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, T1A
capture 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 WPND
WEN
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 Interrupt Enable (Multi-Input Wakeup/
Interrupt)
T0PND
Timer T0 Interrupt pending
T0EN
Timer T0 Interrupt Enable (Bit 12 toggle)
WPND
MICROWIRE/PLUS interrupt pending
WEN
Enable MICROWIRE/PLUS interrupt
T1PNDB
Timer T1 Interrupt Pending Flag for T1B cap-
ture edge
T1ENB
Timer T1 Interrupt Enable for T1B Input cap-
ture edge
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
control
in
timer
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
T3CNTRL Register (Address X'00B6)
T3C3
T3C2
T3C1
T3C0
T3PNDA
T3ENA
T3PNDB
T3ENB
Bit 7
Bit 0
The T3CNTRL control register contains the following bits:
T3C3
Timer T3 mode control bit
T3C2
Timer T3 mode control bit
T3C1
Timer T3 mode control bit
T3C0
Timer
T3
Start/Stop
control
in
timer
modes 1 and 2, T3 Underflow Interrupt Pend-
ing Flag in timer mode 3
T3PNDA
Timer T3 Interrupt Pending Flag (Autoreload
RA in mode 1, T3 Underflow in mode 2, T3A
capture edge in mode 3)
T3ENA
Timer T3 Interrupt Enable for Timer Underflow
or T3A Input capture edge
T3PNDB
Timer T3 Interrupt Pending Flag for T3B cap-
ture edge
T3ENB
Timer T3 Interrupt Enable for Timer Underflow
or T3B Input capture edge
6.0 Timers
Each device contains a very versatile set of timers (T0, T1,
T2 and T3). Timer T1, T2 and T3 and associated autoreload/
capture registers power up containing random data.
6.1 TIMER T0 (IDLE TIMER)
Each device supports applications that require maintaining
real time and low power with the IDLE mode. This IDLE
mode support is furnished by the IDLE timer T0. The Timer
T0 runs continuously at the fixed rate of the instruction cycle
clock, t
C. The user cannot read or write to the IDLE Timer T0,
which is a count down timer.
The Timer T0 supports the following functions:
Exit out of the Idle Mode (See Idle Mode description)
WATCHDOG logic (See WATCHDOG description)
Start up delay out of the HALT mode
COP8SG
Family
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