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SM59A16U1
8-Bit Micro-controller
64KB with ISP Flash
& 6K+256B RAM embedded
Function Description
1.
General Features
SM59A16U1 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 64KBFlash 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 SM59A16U1 has Five I/O ports: Port 0, Port 1, Port 2 , Port 3 and Port4. Ports 0, 1, 2, 3 are 8-bit ports.. These are:
quasi-bidirectional (standard 8051 port outputs), push-pull, open drain, and input-only. As description in section 5.
All the pads for P0、P1、P2、P3 and P4 are with slew rate to reduce EMI. The IO pads can withstand 4KV ESD in
human body mode guaranteeing the SM59A16U1‟s quality in high electro-static environments.
The OCI_SCL、ALE and OCI_SDA can be configured as I/O ports P4.4、P4.5 and P4.6 by writer or in ISP mode.
All the pins on P0 ~ P4 are with slew rate adjustment 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 SM59A16U1‟s quality in high electro-static environments.
1.3
2T/1T Selection
SM59A16U1 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. 1-1.
Fig. 1-1: (a)The waveform of internal instruction signal in 2T mode
Fig. 1-2: (b)The waveform of internal instruction signal in 1T mode
The default is in 1T mode, not every instruction can be executed with one machine cycle.
The exact machine cycle number for all the instructions are given in the next section.
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M071
Ver A
SM59A16U1
04/12/2013
- 22 -
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
