II CORE BLOCK: BCU (Bus Control Unit)
B-II-4-40
EPSON
S1C33210 FUNCTION PART
RCA1–RCA0: Column address size selection (D[B:A]) / Bus control register (0x4812E)
Select the column address size of DRAM.
Table 4.23 Column Address Size
RCA1
RCA0
Column address size
1
1
11
1
0
10
0
1
9
0
0
8
The contents set here are applied to all of areas 14, 13, 8, and 7 that are set for DRAM.
RCA can be read to obtain its set value.
At cold start, RCA is set to "0" (8 bits). At hot start, RCA retain its status before being initialized.
RPC2: Refresh enable (D9) / Bus control register (0x4812E)
Control the DRAM refresh function.
Write "1": Enabled
Write "0": Disabled
Read: Valid
When DRAM is connected directly, a refresh cycle is generated by writing "1" to RPC2. The internal refresh
function is disabled by writing "0" to RPC2.
Since the BCU stops operating in the HALT2 and the SLEEP modes, no refresh cycle is generated regardless of how
this bit is set.
The contents set here are applied to all of areas 14, 13, 8, and 7 that are set for DRAM.
At cold start, RPC2 is set to "0" (disabled). At hot start, RPC2 retains its status before being initialized.
RPC1: Refresh method selection (D8) / Bus control register (0x4812E)
Select the DRAM refresh method.
Write "1": Self-refresh
Write "0": CAS-before-RAS refresh
Read: Valid
To perform a CAS-before-RAS refresh, set RPC1 to "0" and then RPC2 to "1". This causes the underflow output
signal of the 8-bit programmable timer 0 is fed to the DRAM interface, at which timing a refresh cycle is generated.
To start a self-refresh, set RPC1 to "1" and then RPC2 to "1". The self-refresh is disabled by writing "0" to RPC2.
The contents set here are applied to all of areas 14, 13, 8, and 7 that are set for DRAM.
At cold start, RPC1 is set to "0" (CAS-before-RAS refresh). At hot start, RPC1 retains its status before being
initialized.
RPC0: Refresh RPC delay (D7) / Bus control register (0x4812E)
Set a RPC delay when at start of refresh.
Write "1": 2 cycles
Write "0": 1 cycle
Read: Valid
Set a time from the immediately preceding precharge to the falling transition of #HCAS/#LCAS necessary in order to
perform a refresh. This time is 2 cycles when RPC0 = "1" or 1 cycle when RPC0 = "0".
The contents set here are applied to all of areas 14, 13, 8, and 7 that are set for DRAM.
At cold start, RPC0 is set to "0" (1 cycle). At hot start, RPC0 retains its status before being initialized.
Содержание S1C33210
Страница 4: ......
Страница 13: ...S1C33210 PRODUCT PART ...
Страница 14: ......
Страница 124: ...APPENDIX B PIN CHARACTERISTICS A 110 EPSON S1C33210 PRODUCT PART THIS PAGE IS BLANK ...
Страница 125: ...S1C33210 FUNCTION PART ...
Страница 126: ......
Страница 127: ...S1C33210 FUNCTION PART I OUTLINE ...
Страница 128: ......
Страница 130: ...I OUTLINE INTRODUCTION B I 1 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 138: ...I OUTLINE LIST OF PINS B I 3 6 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 139: ...S1C33210 FUNCTION PART II CORE BLOCK ...
Страница 140: ......
Страница 142: ...II CORE BLOCK INTRODUCTION B II 1 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 148: ...II CORE BLOCK CPU AND OPERATING MODE B II 2 6 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 152: ...II CORE BLOCK INITIAL RESET B II 3 4 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 224: ...II CORE BLOCK ITC Interrupt Controller B II 5 26 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 234: ...II CORE BLOCK CLG Clock Generator B II 6 10 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 236: ...II CORE BLOCK DBG Debug Unit B II 7 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 237: ...S1C33210 FUNCTION PART III PERIPHERAL BLOCK ...
Страница 238: ......
Страница 240: ...III PERIPHERAL BLOCK INTRODUCTION B III 1 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 266: ...III PERIPHERAL BLOCK 8 BIT PROGRAMMABLE TIMERS B III 3 18 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 292: ...III PERIPHERAL BLOCK 16 BIT PROGRAMMABLE TIMERS B III 4 26 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 296: ...III PERIPHERAL BLOCK WATCHDOG TIMER B III 5 4 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 429: ...S1C33210 FUNCTION PART IV ANALOG BLOCK ...
Страница 430: ......
Страница 432: ...IV ANALOG BLOCK INTRODUCTION B IV 1 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 448: ...IV ANALOG BLOCK A D CONVERTER B IV 2 16 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 449: ...S1C33210 FUNCTION PART V DMA BLOCK ...
Страница 450: ......
Страница 452: ...V DMA BLOCK INTRODUCTION B V 1 2 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 506: ...V DMA BLOCK IDMA Intelligent DMA B V 3 18 EPSON S1C33210 FUNCTION PART THIS PAGE IS BLANK ...
Страница 507: ...S1C33210 FUNCTION PART Appendix I O MAP ...
Страница 508: ......
Страница 557: ......