SM59R16A2/SM59R08A2
8-Bit Micro-controller
64KB/32KB ISP Flash & 2KB RAM embedded
Function Description
1
General Features
SM59R16A2/SM59R08A2 is an 8-bit micro-controller. All of its functions and the detailed meanings
of SFR will be given in the following sections.
1.1 Embedded Flash
The program can be loaded into the embedded 64KB/32KB Flash memory via its writer or In-System
Programming (ISP).The high-quality Flash has a 100K-write cycle life, suitable for re-programming
and data recording as EEPROM.
1.2 IO Pads
The IO pads are compatible to the 8052 series. P0 is open-drain in the input or output high condition,
so the external pull-up resistor is required. P1 ~ P5 are designed with internal pull-up resistors.
The IO pad structure is given below:
Fig. 1-1: IO pad structure
All the pads for P0 ~ P5 are with slew rate to reduce EMI. The other way to reduce EMI is to disable
the ALE output if unused. This is selected by its SFR. The IO pads can withstand 4KV ESD in
human body mode guaranteeing the SM59R16A2/SM59R08A2’s quality in high electro-static
environments.
1.3 2T/1T Selection
The conventional 52-series MCUs are 12T, i.e., 12 oscillator clocks per machine cycle.
SM59R16A2/SM59R08A2 is a 2T or 1T MCU, i.e., its machine cycle is two-clock or one-clock. In
the other words, it can execute one instruction within two clocks or only one clock. The difference
between 2T mode and 1T mode are given in the example in Fig. 1-2.
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M034
10
Ver.B SM59R16A2/SM59R08A2 06/2009
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
