3850 datasheet(68/261 Pages) RENESAS

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3850/3851 Group User’s Manual

HARDWARE

1-53

FUNCTIONAL DESCRIPTION SUPPLEMENT

3850 group

Differences between 3850 and 3851 groups

3850 group MCUs do not have the built-in I2C-bus as in the 3851

group. Accordingly, the 3850 group does not have registers

relevent to I2C-bus interface for the SFR area. The structure of the

interrupt control registers also differs. The following is a list of reg-

isters which are not included in the 3850 Group.

(1) I2C data shift register (address 002B16)

(2) I2C address register (address 002C16)

(3) I2C status register (address 002D16)

(4) I2C control register (address 002E16)

Fix ES0 bit (bit3) to “0”.

(5) I2C clock control register (address 002F16)

(6) I2C START/STOP condition control register

(address 003016)

(7) SCL/SDA interrupt request bit (bit1) of Interrupt

request register 1 (address 003C16)

(8) I2C interrupt request bit (bit5) of Interrupt request

(9) SCL/SDA interrupt enable bit (bit1) of Interrupt control

Fix this bit to “0”.

(10) I2C interrupt enable bit (bit5) of Interrupt control

Fix this bit to “0”.

48K

ROM size (bytes)

32K

28K

24K

20K

16K

12K

128

192

256

RAM size (bytes)

384

512

640

768

896

1024

M38503M4/E4

Under development

M38504M6/E6

Mass production

M38503M2

Mass production

Fig. 59 Memory expansion plan of 3850 group

3850 Datasheet(PDF) 68 Page - Renesas Technology Corp

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