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Interfacing to the Motorola MC68328 "Dragonball" Microprocessor S1D13504
Issue Date: 01/02/02 X19A-G-013-02
4.2 S1D13504 Hardware Configuration
The S1D13504 latches MD15 through MD0 to allow selection of the bus mode and other configuration data on the rising edge of RESET#. Table 4-2 shows the settings used for the S1D13504 in these interfaces. MD1, MD2, and MD3 should be set to select either MC68000 Bus 1 mode or Generic bus mode as desired. The other settings are identical for either bus mode.Table 4-1: Summary of Power-On/Reset Options
S1D13504
Pin Name
value on this pin at rising edge of RESET# is used to configure:(1/0)
10
MD0 8-bit host bus interface 16-bit host bus interface
MD1
See Host Bus Selection table below See Host Bus Selection table belowMD2
MD3
MD4 Little Endian Big Endian
MD5 Wait# signal is active high Wait# signal is active low
MD6 See Memory Configuration table below See Memory Configuration table below
MD7
MD8 Configure DACRD#, BLANK#, DACP0,
DACWR#, DACRS0, DACRS1, HRTC,
VRTC as GPIO4-11
Configure DACRD#, BLANK#, DACP0,
DACWR#, DACRS0, DACRS1, HRTC, VRTC
as DAC / CRT outputs
MD9 Configure SUSPEND# pin as GPO output Configure SUSPEND# pin as Hardware
Suspend Enable
MD10 Active low (On) LCDPWR / GPO polarity Active high (On) LCDPWR / GPO polarity
MD11 Reserved
MD12 Reserved
MD13 Reserved
MD14 Reserved
MD15 Reserved
= required settings for MC68328 support.
Table 4-2: S1D13504 Host Bus Selection
MD3 MD2 MD1 Option Host Bus Interface
0 0 0 1 SH-3 bus interface
0 0 1 2 MC68K bus 1 interface (e.g. MC68000)
0 1 0 3 MC68K bus 2 interface (e.g. MC68030)
0 1 1 4 Generic bus interface (e.g. MC68328, ISA bus interface)
1xx5Reserved
= required settings for MC68328 support.