MC80F0424 Datasheet, PDF (40/135 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

MC80F0424/0432/0448
Preliminary
Address Name
Bit 7
Bit 6
Bit 5
FEH PU4
R4 Pull-up Selection Register
EE6H ASIMR1
TXE
RXE
PS1
EE7H ASISR1
-
-
-
EE8H BRGCR1
-
TPS2
TPS1
RXR1
EE9H
TXR1
UART1 Receive Buffer Register
UART1 Transmit Shift Register
Bit 4
PS0
-
TPS0
Bit 3
Bit 2
Bit 1
Bit 0
-
-
MLD3
SL
PE
MLD2
ISRM
FE
MLD1
-
OVE
MLD0
Table 8-2 Control Register Function Description
1. The register BITR and CKCTLR are located at same address. Address ECH is read as BITR, written to CKCTLR.
Caution) The registers of dark-shaded area can not be accessed by bit manipulation instruction such as "SET1, CLR1", but should be
accessed by register operation instruction such as "LDM dp,#imm".
8.4 Addressing Mode
The MC800 series MCU uses six addressing modes;
• Register addressing
• Immediate addressing
• Direct page addressing
• Absolute addressing
• Indexed addressing
• Register-indirect addressing
8.4.1 Register Addressing
Register addressing accesses the A, X, Y, C and PSW.
8.4.2 Immediate Addressing → #imm
In this mode, second byte (operand) is accessed as a data imme-
diately.
Example:
0435 ADC #35H
MEMORY
04
A+35H+C → A
35
When G-flag is 1, then RAM address is defined by 16-bit address
which is composed of 8-bit RAM paging register (RPR) and 8-bit
immediate data.
Example: G=1
E45535 LDM 35H,#55H
0135H
data
➊ ^~~
0F100H
E4
0F101H
55
0F102H
35
data ← 55H
~~
➋
8.4.3 Direct Page Addressing → dp
In this mode, a address is specified within direct page.
Example; G=0
36
MAR. 2005 Ver 0.2