RL78/G13 RL78/L12

Pin Identification 引脚名称

ANI0 to ANI14: Analog Input
INT: Interrupt request from peripheral
EXCLK: External clock input (Main system clock)
EXCLKS: External clock input (Subsystem clock)
X1, X2: Crystal oscillator (main system clock)
XT1, XT2: Crystal oscillator (subsystem clock)
VDD: Power supply
VSS: Ground
TxD0 to TxD3: Transmit data
RxD0 to RxD3: Receive Data
TI10 to TI17: Timer input
TO10 to TO17: Timer output
SI20, SI21, SI30, SI31: Serial data input
SO30, SO31: Serial data output
SDAA0, SDAA1, SDA00: Serial Data Input/Output
TOOL0: Data Input/Output for Tool
TOOLRxD, TOOLTxD: Data Input/Output for External Device
SCLA0, SCLA1: Serial Clock Input/Output
RESET: Reset
KR0 to KR7: Key Return
P00 to P07: Port 0
EVDD0, EVDD1: Power Supply for Port
EVSS0, EVSS1; Ground for Port
AVREFM: Analog Reference Voltage Minus
AVREFP: Analog Reference Voltage Plus
PCLBUZ0, PCLBUZ1: Programmable Clock Output/Buzzer Output
REGC: Regulator Capacitance
RTC1HZ: Real-time Clock Correction Clock (1 Hz) Output

单片机构成

[构成要素](https://www.renesas.com/zh-cn/support/technical-resources/engineer-school/mcu-01-basic-structure-operation.html)

MCU

Programming the RL78 flash memory using an external device

The RL78 incorporates firmware that controls flash memory programming. The programming to the internal flash memory is performed by transmitting/receiving commands between the programmer and the RL78 via serial communication. There are two ways to program the flash memory in an RL78 using an external device:

Programming flash memory

• Writing to flash using a flash memory programmer

• Writing to flash using an external device that incorporates a UART
  ASIC(Application Specific Integrated Circuits，专用集成电路)

  
  
  

  System Outline of Flash Memory Programming in RL78

Paste_Image.png

The TOOL0 pin is used for single-wire UART communication.

TxD and RxD pins are used for two-wire UART communication

Outline of Functions 功能概要

项目	译文	解释
Code flash memory	代码闪存
bar	bar	bar
baz	baz	baz

RL78/L1x

The RL78/L1x microcontroller family is a peripheral rich family of true low power microcontrollers integrating LCD controller/driver, suitable for industrial and consumer LCD display applications. RL78/L1x offer unique display driver functionality to reduce system power consumption.
Low power consumption, compact LCD microcontrollers suitable for small appliances and healthcare devices
RL78/L12 microcontrollers have a built-in segment LCD driver. Three LCD driving voltage generation methods (external resistance division, capacitive split, and internal voltage boost) are supported, corresponding to a variety of segment LCD panels. They realize low current consumption (1): external resistance division: 1.60 μA (2), internal voltage boost: 1.19 μA, and capacitive split: 0.68 µA. With a lineup of 32 to 64-pin products supporting up to 280 segments, these microcontrollers are perfect for small devices with built-in LCD panels such as small appliances and healthcare devices.
(Remarks)(1) Current (typ.) at 1/3 bias, subclock operation, HALT mode, and RTC operation(2) Registance value for external registance division = 1000 kΩ

RL78/L12 MCUs run at up to 24 MHz, consuming just 75 μA/MHz in active mode; 0.64 μA in Halt mode (RTC + LVD); and 0.23 μA in Stop mode (with RAM retention). The LCD circuit adds just another 0.61 μA due to internal voltage boost, a 30% saving over competitive products. The devices resemble an RL78/G13 with less program flash (8-32 KB), SRAM (1.0/1.5 KB), and data flash (2 KB) but comparable low-power and performance specs.

RAM retention:至于关闭模式 (RAM Retention)： 0.1μA，有不少单片机能达到，因为这个就是关闭cpu和外设，只保留RAM供电，没什么技术难度。完全休眠(RAM Retention)模式。
ECC是“Error Correcting Code”的简写，中文名称是“错误检查和纠正”。
EMI电磁干扰（Electro-Magnetic Interference）
quartz resonator(石英谐振器)
PRE-SCALER 前置脉冲分频器
drive an external 32 KHz Oscillator to implement real-time clock systems on the chip
Direct Memory Access (DMA) Controller
能在支持DMA 外围硬件的SFR 和内部RAM 之间不经过CPU 而自动传送数据。

0007 RL78_port_arcitecture.pptx
The port function multiplexer（多路复用）, which allows the user flexible pin assignments in regards to peripherals, especially in low pin count versions. For example, on a 30 pin device, if it is desired to use all the PWM outputs outside, then the pin multiplexer, controlled by the Peripheral I/O Reduction Redirection Register PIOR, can be used to have all the timeout PWM outputs connected to output pins.
peripheral I/O redirection register (PIOR)

Switchable input/output characteristics for dedicated I/O pins
CMOS or TTL
第一讲-CMOS器件物理.pdf