sh6631a SinoWealth Micro-Electronics Corp. Ltd, sh6631a Datasheet - Page 4

• Manufacturer Part Number: sh6631a
• Description: Mask 4-bit Microcontroller
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

3. RAM
Built-in RAM consists of general purpose data memory and system registers.
Data memory and the system register can be accessed by direct addressing in one instruction.
The following is the memory allocation map:
$000 - $01F: System register and I/O; $020 - $04F: Data memory (48 × 4 bits).
Configuration of System Register
*Please refer to SH6610C user’s manual for more detailed information on System Register $00 ~ $12 (except $0D)
Address
$0A
$0B
$0C
$0D
$0E
$1A
$1B
$1C
$1D
$1E
$00
$01
$02
$03
$04
$05
$06
$07
$08
$09
$0F
$10
$11
$12
$13
$14
$15
$16
$17
$18
$19
$1F
PA3OUT
PB3OUT
PC3OUT
PPULL
TBR.3
DPL.3
TH0.3
TL0.3
INX.3
LPD3
PA.3
PB.3
PC.3
Bit3
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PC2OUT
PA2OUT
PB2OUT
DPM.2
IRQT0
DPH.2
TM0.2
TH0.2
TBR.2
DPL.2
TL0.2
INX.2
LPD2
PA.2
PB.2
PC.2
IET0
CPS
Bit2
-
-
-
-
-
-
-
-
-
-
-
-
-
PA1OUT
PB1OUT
PC1OUT
PD1OUT
DPM.1
DPH.1
TM0.1
TBR.1
TH0.1
DPL.1
TL0.1
INX.1
LPD1
PC.1
PD.1
PA.1
PB.1
Bit1
CF1
T0S
-
-
-
-
-
-
-
-
-
-
-
-
PD0OUT
PA0OUT
PB0OUT
PC0OUT
REMO
DPM.0
DPH.0
TM0.0
TBR.0
DPL.0
TH0.0
TL0.0
INX.0
LPD0
IRQP
PA.0
PB.0
PC.0
PD.0
Bit0
CF0
T0E
IEP
-
-
-
-
-
-
-
-
-
4
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
W
W
W
W
W
W
-
-
-
-
-
-
-
-
-
Interrupt enable flags
Interrupt request flags
Timer0 Mode register (Prescaler)
Reserved
Timer0 load/counter register low digit
Timer0 load/counter register high digit
Reserved
Reserved
PORTA
PORTB
PORTC
PORTD
Reserved
REM Data Output
Table Branch Register
Pseudo index register
Data pointer for INX low nibble
Data pointer for INX middle nibble
Data pointer for INX high nibble
Bit1-0: Carrier Frequency Control
Bit2: Carrier OSC pre-divider
Bit3: Port Pull-up MOS Control
Reserved
LPD Enable Control (LPD3 ~ 0):
0101: LPD Enable (Power-on initial)
1010: LPD Disable
Set PORTA to be output port
Set PORTB to be output port
Set PORTC to be output port
Set PORTD to be output port
Reserved
Reserved
Bit0: T0 signal edge
Bit1: T0 signal source
Reserved
Reserved
Reserved
Description
SH6631A