II CORE BLOCK: BCU (Bus Control Unit)
S1C33L03 FUNCTION PART
EPSON
B-II-4-43
A-1
B-II
BCU
SWAITE: #WAIT enable (D0) / Bus control register (0x4812E)
Enable or disable wait cycle control via the #WAIT pin.
Write "1": Enabled
Write "0": Disabled
Read: Valid
A wait request from an SRAM device is made acceptable by writing "1" to SWAITE. The wait request signal input
from the #WAIT pin is sampled at each falling edge of the bus clock when executing an SRAM read/write cycle.
Wait cycles are inserted until the wait request signal is sampled and detected as high (inactive).
Wait control for 0 to 7 cycles can be accomplished by AxxWT without using the #WAIT pin. However, since the
setting via AxxWT is applied to every two areas, the number of wait cycles may be controlled individually in each
area or more than 7 wait cycles may be set. In such a case, use an external wait request via the #WAIT pin.
Wait requests from the #WAIT pin are ignored when SWAITE = "0".
The contents set here are applied to all areas that are set for SRAM, and are also effective for write cycles in the
areas that are set for burst ROM.
At cold start, SWAITE is set to "0" (disabled). At hot start, SWAITE retains its status before being initialized.
A3EEN: Area 3 emulation (DB) / DRAM timing set-up register (0x48130)
Select area 3 emulation mode.
Write "1": Internal ROM mode
Write "0": Emulation mode
Read: Valid
When "0" is written to A3EEN, internal ROM emulation mode is selected and the external device will be accessed
with the same condition as the internal ROM. When "1" is written, the internal ROM will be used for accessing
area 3. This bit functions the same as the EA3MD pin. The bit status and the pin status are logically ORed.
At cold start, A3EEN is set to "1" (internal ROM mode). At hot start, A3EEN retains its status before being
initialized.
CEFUNC1–CEFUNC0: #CE pin function selection (D[A:9]) / DRAM timing set-up register (0x48130)
Change the #CE pin-assigned area.
Table 4.28 #CE Output Assignment
Pin
CEFUNC = "00"
CEFUNC = "01"
CEFUNC = "1x"
#CE4
#CE4
#CE11
#CE11+#CE12
#CE5
#CE5
#CE15
#CE15+#CE16
#CE6
#CE6
#CE6
#CE7+#CE8
#CE7/#RAS0
#CE7/#RAS0
#CE13/#RAS2
#CE13/#RAS2
#CE8/#RAS1
#CE8/#RAS1
#CE14/#RAS3
#CE14/#RAS3
#CE9
#CE9
#CE17
#CE17+#CE18
#CE10EX
#CE10EX
#CE10EX
#CE9+#CE10EX
(Default: CEFUNC = "00")
The high-order areas that are made available for use by writing "01" to CEFUNC can be larger in size than the
default low-order areas. For example, when using DRAM in default settings, the available space is 4 MB in areas 7
and 8. However, if areas 13 and 14 are used, up to 32 MB of DRAM can be used. The same applies to the other
areas.
Furthermore, when CEFUNC is set to "10" or "11", four chip enable signal is expanded into two area size.
At cold start, CEFUNC is set to "00". At hot start, CEFUNC retains its status before being initialized.
Summary of Contents for CMOS 32-Bit Single Chip Microcomputer S1C33L03
Page 4: ......
Page 14: ......
Page 15: ...S1C33L03 PRODUCT PART ...
Page 16: ......
Page 147: ...S1C33L03 FUNCTION PART ...
Page 148: ......
Page 149: ...S1C33L03 FUNCTION PART I OUTLINE ...
Page 150: ......
Page 152: ...I OUTLINE INTRODUCTION B I 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 162: ...I OUTLINE LIST OF PINS B I 3 8 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 163: ...S1C33L03 FUNCTION PART II CORE BLOCK ...
Page 164: ......
Page 166: ...II CORE BLOCK INTRODUCTION B II 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 172: ...II CORE BLOCK CPU AND OPERATING MODE B II 2 6 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 176: ...II CORE BLOCK INITIAL RESET B II 3 4 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 224: ...II CORE BLOCK BCU Bus Control Unit B II 4 48 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 262: ...II CORE BLOCK DBG Debug Unit B II 7 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 263: ...S1C33L03 FUNCTION PART III PERIPHERAL BLOCK ...
Page 264: ......
Page 266: ...III PERIPHERAL BLOCK INTRODUCTION B III 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 322: ...III PERIPHERAL BLOCK WATCHDOG TIMER B III 5 4 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 415: ...S1C33L03 FUNCTION PART IV ANALOG BLOCK ...
Page 416: ......
Page 418: ...IV ANALOG BLOCK INTRODUCTION B IV 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 434: ...IV ANALOG BLOCK A D CONVERTER B IV 2 16 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 435: ...S1C33L03 FUNCTION PART V DMA BLOCK ...
Page 436: ......
Page 438: ...V DMA BLOCK INTRODUCTION B V 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 492: ...V DMA BLOCK IDMA Intelligent DMA B V 3 18 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 493: ...S1C33L03 FUNCTION PART VI SDRAM CONTROLLER BLOCK ...
Page 494: ......
Page 531: ...S1C33L03 FUNCTION PART VII LCD CONTROLLER BLOCK ...
Page 532: ......
Page 579: ...S1C33L03 FUNCTION PART Appendix I O MAP ...
Page 580: ......