tmp88f846ug TOSHIBA Semiconductor CORPORATION, tmp88f846ug Datasheet - Page 199

• Manufacturer Part Number: tmp88f846ug
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

19. Serial PROM Mode
19.1 Outline
19.2 Memory Mapping
BOOTROM is available in the serial PROM mode, and controlled by TEST, BOOT,
nication is performed via UART. The serial PROM mode has seven types of operating mode: Flash memory writing,
RAM loader, Flash memory SUM output, Product ID code output, Flash memory status output, Flash memory eras-
ing and Flash memory read protection setting. Memory address mapping in the serial PROM mode differs from that
in the MCU mode. Figure 19-1 shows memory address mapping in the serial PROM mode.
memory is divided into two banks for mapping. Therefore, when the RAM loader mode (60H) is used, it is required
to specify the flash memory address according to Figure 19-1 (For detail of banks and control register, refer to the
chapter of “Flash Memory Control Register”.)
Flash memory
The TMP88F846UG has a 4096 byte BOOTROM (Mask ROM) for programming to flash memory. The
Note: Though included in above operating range, some of high frequencies are not supported in the serial PROM mode. For
Note: As for TMP88F846UG, high frequencies becomes 20MHz fixation by a built-in oscillator. Moreover, there is a case where
The Figure 19-1 shows memory mapping in the Serial PROM mode and MCU mode.
In the serial PROM mode, the BOOTROM (Mask ROM) is mapped in addresses from 3000H to 3FFFH. The flash
BOOTROM
details, refer to “Table 19-5”.
communication becomes impossible, since the frequency of a built-in oscillator is changed with temperature etc. Please use
in normal temperature (around 25 degrees ) as much as possible.
RAM
DBR
SFR
Table 19-1 Operating Range in the Serial PROM Mode
Power supply
High frequency (Note)
FFFFFH
002BFH
01FFFH
03FFFH
05EFFH
0003FH
01F80H
FFF00H
00000H
00040H
03000H
04000H
Parameter
Serial PROM mode
512 +128 bytes
4096 bytes
Vector table
(256 bytes)
8064 bytes
144 bytes
Figure 19-1 Memory Address Maps
64 bytes
Min
4.5
8
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Flash memory
RAM
DBR
SFR
Max
5.5
20
002BFH
01FFFH
05EFFH
FFFFFH
0003FH
01F80H
FFF00H
00000H
00040H
04000H
RESET
512 +128 bytes
Vector table
MCU mode
8064 bytes
(256 bytes)
144 bytes
MHz
Unit
64 bytes
V
and some pins. Commu-
TMP88F846UG