32186 datasheet(144/1032 Pages) RENESAS

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INTERNAL MEMORY

6-2

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

6.1 Outline of Internal Memory

The 32185/32186 internally contain the following types of memory:

• 64-Kbyte and 32-Kbyte RAM

• 1-Mbyte (1024 Kbytes) and 512-Kbyte flash memories

6.2 Internal RAM

Specifications of the internal RAM are shown below.

Table 6.2.1 Specifications of the Internal RAM

Item

Specification

Size

M32185F4: 32 Kbytes

M32186F8: 64 Kbytes

Location address

M32185F4: H'0080 4000 to H'0080 BFFF

M32186F8: H’0080 4000 to H’0081 3FFF

Wait insertion

Operates with zero wait states

Internal bus connection

Connected by 32-bit bus

Dual port

By using the Real-Time Debugger (RTD), data can be read (monitored) or written to any area of

the internal RAM via serial communication from external devices independently of the CPU. (See

Chapter 15, “Real-Time Debugger.”)

Note: • Immediately after power-on reset (for the power-on case in which VDDE also goes up from GND), the value of the

RAM is undefined. However when RAM back up mode is used(power for only VDDE is on) RAM retains the value

before exiting reset for only RAM back up area.

6.3 Internal RAM Protect Function

This function monitors writes to the internal RAM.

Writes to the RAM can be disabled in 16-Kbyte units for H'0080 4000 to H'0084 3FFF. If the area where

disabled a write is accessed for write, an interrupt can be generated.

Note: • The internal resources that are likely to access the internal RAM for write include six modules:

CPU, DMA, SDI (tool), NBD, RTD, and DRI. Of these, the RTD and DRI are not subject to the

RAM protect function, so that write accesses made to the internal RAM by the RTD or DRI cannot

be detected.

6.1 Outline of Internal Memory

32186 Datasheet(PDF) 144 Page - Renesas Technology Corp