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ML51/ML54/ML56
Sep. 01, 2020
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ML51/M
L54
/M
L56
Series
Tec
hnical Reference
Manual
2 FEATURES
Core and System
8051
Fully static design 8-bit high performance 1T 8051-based
CMOS microcontroller.
Instruction set fully compatible with MCS-51.
4-priority-level interrupts capability.
Dual Data Pointers (DPTRs).
Power on Reset (POR)
POR with 1.55V threshold voltage level
Brown-out Detector (BOD)
7-level selection, with brown-out interrupt and reset option.
(4.4V / 3.7V / 3.0V / 2.7V / 2.4V / 2.0V / 1.8V)
Low Voltage Reset (LVR)
LVR with 1.63V threshold voltage level
Security
96-bit Unique ID (UID)
128-bit Unique Customer ID (UCID)
128-bytes security protection memory SPROM
Memories
Flash
Up to 64 KBytes of APROM for User Code.
4/3/2/1 Kbytes of Flash for loader (LDROM) configure from
APROM for In-System-Programmable (ISP)
Flash Memory accumulated with pages of 128 Bytes from
APROM by In-Application-Programmable (IAP) means whole
APROM can be use as Data Flash
An additional 128 bytes security protection memory SPROM
Code lock for security by CONFIG
SRAM
256 Bytes on-chip RAM.
Additional 4 KBytes on-chip auxiliary RAM (XRAM) accessed
by MOVX instruction.
PDMA
:
Three modes: peripheral-to-memory, memory-to-peripheral,
and memory-to-memory transfer.
Source address and destination address must be word
alignment in all modes.
Memory-to-memory mode: transfer length must be word
alignment.