HT46R068B/HT46R069B
Enhanced A/D Type 8-bit OTP MCU
● HT46R069B
Bit
BP
R/W
POR
7
6
PMBP1
R/W
0
5
PMBP0
R/W
0
4
3
2
DMBPꢃ
R/W
0
1
DMBP1
R/W
0
0
DMBP0
R/W
0
—
—
—
—
—
—
—
—
—
Bit 7
unimplemented, read as "0"
Bit 6, 5
PMBP1, PMBP0: Program Memory Bank Pointer
00: Bank 0
01: Bank 1
10: Bank 2
11: Bank 3
Bit 4~3
unimplemented, read as "0"
Bit 2~0
DMBP2, DMBP1, DMBP0: Data Memory Bank Pointer
000: Bank 0
001: Bank 1
010: Bank 2
011: Bank 3
100: Bank 4
101: Bank 5
110: Bank 6
111: Bank 7
Status Register – STATUS
This 8-bit register contains the zero flag (Z), carry flag (C), auxiliary carry flag (AC), overflow
flag (OV), power down flag (PDF), and watchdog time-out flag (TO). These arithmetic/logical
operation and system management flags are used to record the status and operation of the
microcontroller.
With the exception of the TO and PDF flags, bits in the status register can be altered by instructions
like most other registers. Any data written into the status register will not change the TO or PDF
flag. In addition, operations related to the status register may give different results due to the
different instruction operations. The TO flag can be affected only by a system power-up, a WDT
time-out or by executing the "CLR WDT" or "HALT" instruction. The PDF flag is affected only by
executing the "HALT" or "CLR WDT" instruction or during a system power-up.
The Z, OV, AC and C flags generally reflect the status of the latest operations.
In addition, on entering an interrupt sequence or executing a subroutine call, the status register will
not be pushed onto the stack automatically. If the contents of the status registers are important and
if the interrupt routine can change the status register, precautions must be taken to correctly save it.
Note that bits 0~3 of the STATUS register are both readable and writeable bits.
Rev. 1.00
ꢃ4
�anꢀaꢁꢂ ꢃꢄꢅ ꢃ011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
